Background Art Generally the output of the power plants supplies the electric power in response to the demands which varies from hour to hour. Accordingly the power plants possess the power equipments which have the peak load responsive to the peak remands, but the load factor is lower than 60% under the existing conditions.

Disclosure of Invention The object of this invention is to provide equipments for excavating the underground with a kinetic energy transformer which changes vapor or gas having high temperature heat energy generated by the heating action of the electric power into kinetic energy and generates working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim 1 comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim2 comprises high temperature vapor as heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said high temperature vapor as heat energy into kinetic energy and for generating-vapor jet as working fluid which excavates the underground by passing through the excavating underground.

A heat energy supply apparatus according to claim 3 comprises a high temperature vapor generator for generating high temperature vapor as heat energy by the heating action of the electric power.

An underground excavator according to claim 4 comprises high temperature vapor generator for generating high temperature vapor as heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said high temperature vapor as heat energy into kinetic energy and for generating vapor jet as working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim 5 comprises high temperature gas as heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said high temperature gas as heat energy into kinetic energy and for generating high temperature gas jet as working fluid which excavates the underground by passing through the excavating underground.

A heat energy supply apparatus according to claim 6 comprises a high temperature gas generator for generating high temperature gas as heat energy by the heating action of the electric power.

An underground excavator according to claim 7 comprises high temperature gas generator for generating high temperature gas as heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said high temperature gas as heat energy into kinetic energy and for generating high temperature gas jet as working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim 8 comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground and a circulating gas room which adjoins said excavating underground and lets the excavated materials flow with circulating gas.

An excavated materials removal apparatus according to claim comprises a removal means for removing the excavated materials before circulating gas is circulated again by a blower.

An underground excavator according to claim 10 comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground , a circulating gas room which adjoins said excavating underground and lets the excavated materials flow with circulating gas and a removal means for removing the excavated materials before circulating gas is circulated again by a blower.

An underground excavator according to claim 11 comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground a circulating gas room which adjoins the excavating underground and lets the excavated materials flow with circulating gas, a detecting means for detecting the parts of which the underground are not yet excavated in said circulating gas room and means for directing said working fluid to excavate said parts of which the underground are not yet excavated in said circulating gas room.

An underground excavator according to claim 12 comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground, a circulating gas room which adjoins the excavating underground and lets the excavated materials flow with circulating gas, a detecting means for detecting the parts of which the underground are not yet excavated in said circulating gas room and means for directing said working fluid to excavate said parts of which the underground are not yet excavated in said circulating gas room or for directing said working fluid to excavate the end of the excavating underground after said detecting means detects the signal that all parts of the excavating underground in said circulating gas room have been excavated.

An underground excavator according to claim 13 comprises high temperature gas generated by the heating action of the electric power and akinetic energy transformer for changing said high temperature gas into kinetic energy and for generating high temperature gas jet as working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim 14 comprises high temperature gas with fine materials generated by the heating action of the electric power and a kinetic energy transformer for changing said high temperature gas with fine materials into kinetic energy and for generating high temperature gas jet with fine materials as working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to Claim 15 comprises high temperature gas generated by the heating action of the electric power and a kinetic energy transformer for changing said high temperature gas into kinetic energy and for generating high temperature gas jet as working fluid which excavates the underground by passing through the excavating underground and a circulating gas room which adjoins the excavating-underground and lets the excavated materials flow with circulating gas.

An underground excavator according to Claim 16 comprises superheated steam with fine materials generated by the heating action of the electric power and a kinetic energy transformer for changing said superheated steam with fine materials into kinetic energy and for generating superheated steam jet with fine materials as working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim 17 comprises superheated steam with fine materials generated by the heating action of the electric power and a kinetic energy transformer for changing said superheated steam with fine materials into kinetic energy and for generating superheated steam jet with fine materials as working fluid which excavates the underground by passing through the excavating underground and a circulating gas room which adjoins the excavating underground and lets the excavated materials flow with circulating gas.

An underground excavator according to claim 18 comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground and a high temperature gas room which includes high temperature gas and adjoins said excavating underground.

An underground excavator according to claim 19 comprises steam near by saturated steam or superheated steam or wet steam generated by the heating action of the electric power and a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim 20 comprises steam near by saturated steam or superheated steam or wet steam generated by the heating action of the electric power and a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid-which excavates the underground by passing through the excavating underground, and a high temperature gas room which includes high temperature gas and adjoins said excavating underground.

A heat energy supply apparatus according to claim 21 comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power.

A heat energy supply apparatus according to claim 22 comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power, and a high temperature gas generator for generating high temperature gas by the heating action of the electric power which adjoins the excavating underground.

An underground excavator according to claim 23 comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power, and a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid which excavates the underground by passing through the excavating underground.

An underground excavator according to claim 24 comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power, and a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid which excavates the underground by passing through the excavating underground and a high temperature gas room which includes high temperature gas and adjoins said excavating underground.

An excavated materials removal apparatus according to claim 2. 5 comprises a blower for circulating gas of a circulating gas room which adjoins the excavating underground and for letting the excavated materials flow with circulating gas and a removal means for removing said excavated materials before said circulating gas is circulated again by said blower.

An underground excavator according to claim 26 comprises steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power, a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid which excavates the underground by passing the excavating underground and a circulating gas room which adjoins said excavating underground and lets the excavated materials flow with circulating gas.

An underground excavator according to claim27 comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power, a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid which excavates underground by passing through the excavating underground and a circulating gas room which adjoins said excavating underground and lets the excavated materials flow with circulating gas.

An underground excavator according to claim 28 comprises steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power, a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid which excavates the underground by passing through the excavating underground, a circulating high temperature gas room which includes high temperature gas and adjoins the excavating underground, a blower for circulating gas of said circulating high temperature gas room and for letting the excavated materials flow with high temperature circulating gas and a removal means for removing said excavated materials before said high temperature circulating gas is circulated again by said blower.

An underground excavator according to claim 29 comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power, a kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet as working fluid which excavates the underground by passing through the excavating underground, a circulating high temperature gas room which includes high temperature gas and adjoins said excavating underground, a blower for circulating gas of said circulating high temperature gas room and for letting the excavated materials flow with high temperature circulating gas and a removal means for removing said excavated materials before said high temperature circulating gas is circulated again by said blower.

An underground excavator according to claim 30 comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power, a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the-underground by passing through the excavating underground and means for melting steel entered from an entrance by the heating action of the electric power and an exit for issuing molted steel to construct the continuous wall.

According to this invention, high temperature heat energy generated by the heating action of the electric power is changed into kinetic energy as working fluid which excavates the underground by passing through the excavating underground.

Accordingly the load factor of the electric plants can be improved by using the electric power in the night.

Best Mode for Carrying out the Invention An underground excavator of this invention comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power (for example, steam near by saturated steam or superheated steam or wet steam generated by the heating action of the electric power) and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid (for example, steam jet) which excavates the underground by passing through the excavating underground (not illustrated for example, a nozzle).

Said vapor or gas having high temperature heat energy generated by the heating action of the electric power (for example, steam near by saturated steam or superheated steam or wet steam generated by the heating action of the electric power ) is changed into kinetic energy as working fluid (for example, steam jet) by said kinetic energy transformer and said working fluid (for example, steam jet) excavates the underground by passing through the excavating underground.

Vapor or gas having high temperature heat energy generated by the heating action of the electric power is not limited to steam near by saturated steam or superheated steam or wet steam, but vapor or gas by which high temperature heat energy can be generated by the heating action of the electric power and high temperature vapor jet or high temperature gas jet as-working fluid excavates the underground by passing through the excavating underground, is within the scope of the subject matter of this invention.

A heat energy supply apparatus which comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power (not illustrated, for example, a boiler by the arc heating action of the electric power) is provided separately and said steam near by saturated steam or superheated steam or wet steam is supplied to said kinetic energy transformer.

The heating action of the electric power is not limited to the arc heating, but the resistance heating, the induction heating, the electromagnetic wave heating, the electron beam heating, the microwave heating etc. by which said steam generator can generate steam near by saturated steam or superheated steam or wet steam, is within the scope of the subject matter of this invention.

The first excavated materials removal apparatus which comprises a blower for circulating gas of a circulating gas room which adjoins the excavating underground and lets the excavated materials flow with said circulating gas, and a removal means for removing said excavated materials before said circulating gas is circulated again by said blower, is provided separately.

An another mode of an underground excavator of this invention comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power (for example, steam near by saturated steam or superheated steam or wet steam generated by the heating action of the electric power), a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid (for example. steam jet) which excavates the underground by passing through the excavating underground (not illustrated, for example, a nozzle) and a high temperature gas room which includes comparatively high temperature gas (for example, air from 100 C to 1200 C) and adjoins the excavating underground (not illustrated).

Generally the excavated depth of the stones and the rocks of the underground by water jet is maximum when the stones and rocks possess the temperature between 400 °C to 600 °C (petroleum technics society journal 48-3, 1983, 203 , 204).

As said high temperature gas room adjoins the excavating underground, the excavating underground becomes to possess the temperature which can be excavated easily.

Said vapor or gas having high temperature heat energy (for example, steam near by saturated steam or superheated steam or wet steam generated by the heating action of the electric power) is changed to kinetic energy as working fluid (for example, steam jet) by said kinetic energy transformer and said working fluid is passed through said high temperature gas room and excavates the underground which said high temperature gas room adjoins.

Accordingly the stones and the rocks can be easily excavated by an underground excavator which provides said high temperature gas room.

A second heat energy supply apparatus of this invention which comprises a steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power (not illustrated, for example, a boiler by the arc heating action of the electric power) and a high temperature gas generator for generating high temperature gas by the heating action of said electric power, is provided separately.

The second excavated materials removal apparatus which comprises a blower for circulating high temperature gas of high temperature gas room which adjoins the excavating underground and lets the excavated materials flow with circulating high temperature gas, and a removal means for removing said excavated materials before said circulating high temperature gas is circulated again by said blower, is provided separately.

Still another mode of an underground excavator of this invention comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power (for example, from 100"C to 1200"C air, preferably from 400 C to 600 C air generated by the heating action of the electric power) and a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating high temperature working fluid (for example, high temperature gas jet) which excavates the underground by passing through the excavating underground (not illustrated, for example a nozzle).

As said high temperature working fluid excavates the excavating underground, the excavating underground becomes to possess the temperature which can be excavated easily.

A third heat energy supply apparatus of this invention which comprises a high temperature gas generator for generating high temperature gas (for example, from 100 °G to 1200 *C air, preferably from 400 OC to 600 OC air) by the heating action of said electric power (not illustrated, for example, a boiler by the arc heating action of the electric power), is provided separately.

Further mode of an underground excavator of this invention comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power, a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground (not illustrated, for example a nozzle) and a circulating gas room which adjoins said excavating underground and lets the excavated materials flow with circulating gas.

According to the further mode of an underground excavator of this invention, the excavated materials of the end of the excavating underground are dropped down to said circulating gas room by excavating the end of the excavating underground (for example from the upper end parts to the lower end parts) by controlling the discharge amount of working fluid for excavating the proper quantity of the end of the excavating underground and most of the excavated materials of the end of the excavating underground are flowed with said circulating gas.

Accordingly after all parts of the end of the excavating underground have been excavated, the underground excavator can move further to excavates the underground which is not excavated.

Still further mode of an underground excavator of this invention comprises vapor or gas having high temperature heat energy generated by the heating action of the electric power, a kinetic energy transformer for changing said vapor or gas having high temperature heat energy into kinetic energy and for generating working fluid which excavates the underground by passing through the excavating underground (not illustrated, for example a nozzle) and means for melting steel entered from an entrance by the heating action of the electric power and an exit for issuing molted steel to construct the continuous wall According to the still further mode of an underground excavator of this invention, before an underground excavator excavates the underground, molten steel can be issued from said exit to construct the continuous wall and after the continuous wall has been constructed, working fluid excavates the underground by passing through the excavating underground.

Embodiments As the first preferred embodiment of this invention, said second heat energy supply apparatus and said second excavated materials removal apparatus are provided separately.

Accordingly steam generator for generating steam near by saturated steam or superheated steam or wet steam by the bg action of electric power (not illustrated, for example a boiler by the arc heating action of the electric power) is provided separately.

The excavating side of an underground excavator possesses a square external form. The circulating high temperature gas room of comparatively high temperature gas (not illustrated, for example a thick high temperature air curtain room) is provided as said high temperature gas room which includes high temperature gas and adjoins the excavating underground.

The another provided blower in said second excavated materials removal apparatus circulates gas of said circulating high temperature gas room from the upper end entrance to the lower end exit of the underground excavator A heat screening air curtain is provided next to said circulating high temperature gas room and air of said heat screening air curtain is circulated by still another provided blower from the another left end entrance to the another right end exit of the underground excavator.

A honeycomb nozzle (not illustrated) is provided in the inside of the underground excavator as said kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet (for example, wet steam jet preferably wet steam jet near by saturated steam jet) which excavates the underground by passing through the excavating underground. Said steam near by saturated steam or superheated steam or wet steam generated by said steam generator is supplied to said honeycomb nozzle through a respective nozzle valve (not illustrated, a known valve) and air during excavation is supplied to the space between said heat screening air curtain and said honeycomb nozzle from the back of the underground excavator.

Also the relative position and the shooting angle between said circulating high temperature gas room and said honeycomb nozzle is constructed to be changed.

Steam near by saturated steam or superheated steam or wet steam generated by said steam generator is changed into kinetic energy as steam jet (for example wet steam jet prefeffably wet steam jet near by saturated steam jet) by said kinetic energy transformer and said steam jet is passed through said circulating high temperature gas room and excavates the underground which said circulating high temperature gas room adjoins.

Accordingly the stones and the rocks possess the temperature which can be easily excavated by an underground excavator which provides said circulating high temperature gas room.

A detecting means (not illustrated a known photo electrical means) detects the parts of which underground are not yet excavated in said circulating high temperature gas room and the shooting angle of said honeycomb nozzle is changed to excavate said parts of which the underground are not yet excavated in said circulating high temperature gas room.

Most of the excavated materials by said steam jet (for example, wet steam jet preferably wet steam jet near by saturated steam jet) are flowed with said circulating gas by said another provided blower and are removed before said circulating gas is circulated again by said another provided blower.

Besides, when said honeycomb nozzle is arranged at the nearest position to said heat screening air curtain after said detecting means detects the signal that all parts of the excavating underground in said circulating high temperature gas room have been excavated, the shooting angle of said honey comb is directed to the end of the excavating underground.

The underground excavator of this invention can excavate the proper quantity of the end of the excavating underground (for example, from the upper end parts to the lower end parts) by controlling discharge amount of the steam jet through said respective nozzle and the excavated materials of the end of the excavating underground are dropped down into said circulating high temperature gas room and most of said excavated materials of the end of the excavating underground are flowed with circulating gas of said circulating high temperature gas room.

After all parts of the end of the excavating underground have been excavated, the underground excavator can move further to excavate the underground which is not excavated.

One preferred embodiment of an excavated materials removal apparatus is as follows.

An excavated materials removal apparatus provides an entrance of circulating gas in one side and an exit of circulating gas in another side. Between said entrance and said exit, said excavated materials removal apparatus also provides a net of one-inch meshes, a net of loose meshes and a net of fine meshes in due order.

Said excavated materials removal apparatus also provides first bottom piste, second bottom plate and third bottom plate under said net of one-inch meshes, said net of loose meshes and said net of fine meshes respectively and the excavated materials removed by said nets are dropped down upon said respective bottom plates.

And said bottom plates can incline in response to the signal detected by said detecting means that all the parts are excavated in said circulating high temperature gas room and return to the former position after the excavated materials are all transferred to the another provided respective receptacles.

Circulating gas of said circulating high temperature gas room by said another provided blower is ejected from said underground excavator and said ejected circulating gas is entered into said excavated materials removal apparatus through said entrance and comparatively big excavated materials are removed by said net of one-inch meshes and said comparatively big excavated materials are dropped down upon said first bottom plate.

Similarly comparatively small excavated materials or fine excavated materials are removed by said net of loose meshes or by said net of fine meshes respectively and said comparatively small excavated materials or said fine excavated materials are dropped down upon said second bottom plate or said third bottom plate respectively.

In response to the signal that all the parts are excavated in said circulating high temperature gas room detected by said detecting means, said bottom plates inclines to transfer said comparatively big excavated materials, said comparatively small excavated materials or or said fine excavated materials upon said respective receptacle.

As the second preferred embodiment of an underground excavator of this invention, said second heat energy supply apparatus and said first excavated materials removal apparatus are provided separately.

Accordingly said steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of electric power (not illustrated , for example, a boiler by the arc heating action of the electric power) and high temperature gas generator for generating high temperature gas by the heating action of electric power (not illustrated, for example, a boiler by the arc heating action of the electric power) are provided separately.

The excavating side of an underground excavator possesses a square external form.

The circulating gas room which adjoins the excavating underground (not illustrated, for example, a thick air curtain room) is provided as said circulating gas room which adjoins said excavating underground and said another provided blower in said excavated materials removal apparatus circulates gas of said circulating gas room from the upper end entrance to the lower end exit of the underground excavator.

A honeycomb nozzle (not illustrated) is provided in the inside of the underground excavator as said kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet (for example, wet steam jet preferably wet steam jet near by saturated steam jet) which excavates the underground by passing through the excavating-underground. Said steam near by saturated steam or superheated steam or wet steam generated by said steam generator is supplied to said honeycomb nozzle through a respective nozzle valve (not illustrated a known valve), or said high temperature gas generated by said high temperature gas generator is changed to supply to said honeycomb nozzle through another respective nozzle valve (not illustrated a known valve).

Also the relative position and the shooting angle between said circulating gas room and said honeycomb nozzle is constructed to be changed.

Steam near by saturated steam or superheated steam or wet steam generated by said steam generator is changed into kinetic energy as steam jet (for example wet steam jet prefeffably wet steam jet near by saturated steam jet) by said Jdnetic energy transformer and said steam jet is passed through said circulating gas room and excavates the underground which said circulating gas room adjoins.

A detecting means (not itlustrated a known photoelectrical means) detects the parts of which underground are not yet excavated in said circulating gas room and the shooting angle of said honeycomb nozzle is changed to excavate said parts of which the underground are not yet excavated in said circulating gas room.

When all the parts of the excavating underground in said circulating gas room are not yet excavated by said steam jet, said high temperature gas is changed to supply to said honeycomb nozzle by said another respective nozzle valve and the excavating underground. becomes to possess the temperature which can be excavated easily and high temperature gas jet or steam jet can easily excavate said parts of which the underground are not yet excavated in said circulating gas room.

Most of the excavated materials by said steam jet (for example, wet steam jet preferably wet steam jet near by saturated steam jet) are flowed with said circulating gas of said circulating gas room by said another provided blower and are removed before circulating gas is circulated again by said another provided blower.

Besides, when said detecting means detects the signal that all parts of the excavating underground in said circulating gas room have been excavated, said honeycomb nozzle is arranged at the nearest position to said circulating gas room and the shooting angle is directed to the end of the underground.

The underground excavator of this invention can excavate the proper quantity of the end of the excavating underground (for example, from the upper end parts to the lower end parts) by controlling the discharge amount of steam jet through said respective nozzle valve and excavated materials of the end of the excavating underground are dropped down to said circulating gas room and most of the excavated materials of the end of the excavating underground are flowed with circulating gas.

Accordingly after all parts of the end of the excavating underground have been excavated, the underground excavator can move further to excavate the underground which is not excavated.

Said first excavated materials removal apparatus is same as previously described as one preferable mode except circulating gas is not circulating high temperature gas.

As the third preferred embodiment of an underground excavator of this invention, said second heat energy supply apparatus and said second excavated materials removal apparatus are provided separately.

Accordingly said steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of the electric power (for example, a boiler by the arc heating action by the electric power) and high temperature gas generator for generating high temperature gas by the heating action of electric power (not illustrated, for example a boiler by the arc heating action of the electric power) are provided separately.

The excavating side of an underground excavator possesses a square external form and circulating high temperature gas room of comparatively high temperature gas (for example, thick high temperature air curtain room) is provided as said high temperature gas room which includes comparatively high temperature gas and adjoins the excavating underground.

A blower (not illustrated a known blower) in the second excavated materials removal apparatus circulates gas of said circulating high temperature gas room from the upper end entrance to lower end exit of the underground excavator.

A heat screening air curtain is provided next to said circulating high temperature gas room and air of said heat screening air curtain is circulated by still another provided blower from the another left end entrance to the another right end exit of the underground excavator.

A rectangular honeycomb nozzle with a detecting means arranged in the center area is movably mounted horizontally and a little vertically in the excavating side of the underground excavator next to said heat screening air curtain as a kinetic energy transformer for changing steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet which excavates the underground by passing through said excavating underground, and said steam near by saturated steam or superheated steam or wet steam generated by said steam generator is supplied to said rectangular honeycomb nozzle through respective nozzle valve (not illustrated known valve) and air during the excavation is supplied to the space between said heat screening air curtain and said rectangular honeycomb nozzle from the back of the underground excavator through a little vertical space Steam near by saturated steam or superheated steam or wet steam generated by said steam generator is changed into kinetic energy as steam jet (for example wet steam jet preferably wet steam jet near by saturated steam jet) by said rectangular honeycomb nozzle and said steam jet is passed through said circulating high temperature gas room and excavates the underground which said circulating high temperature gas room adjoins.

Accordingly the stones and the rocks possess the temperature which can be easily excavated by an underground excavator which provides said circulating high temperature gas room and said excavating underground in said circulating high temperature gas room can be excavated easily by steam jet discharged by said rectangular honeycomb nozzle.

The detecting means arranged in the center area of said rectangular honeycomb nozzle (not illustrated, for example a known photo electrical means) detects the parts of which the underground are not yet excavated in said circulating temperature gas room and the discharge angle of said rectangular honeycomb nozzle is controlled to excavate said parts of which the underground are not yet excavated in said circulating high temperature gas room through said respective nozzle valve.

Most of the excavated materials by said steam jet (for example wet steam jet preferably wet steam jet near by saturated steam jet are flowed with said circulating high temperature gas by said blower and are removed before said circulating high temperature gas is circulated again by said blower.

The shooting angle of the circumferential nozzle of said rectangular honeycomb nozzle are directed to the opposite end of the excavating underground in nearest position of said heat screening air curtain. The opposite end of the excavating underground can be excavated properly from the upper end parts to lower end parts of the excavating underground by controlling discharge amount of steam jet from said circumferential nozzle through said respective nozzle valve, and excavated materials of the end of the excavating underground are dropped down to said circulating high temperature gas room and most of the excavated materials are flowed with circulating gas.

Accordingly after all parts of the end of the excavating underground have been excavated, the underground excavator can move further to excavate the underground which is not excavated.

As the fourth preferred embodiment of an underground excavator of this invention, the third heat energy supply apparatus comprising a high temperature gas generator for generating high temperature gas by the heating action of electric power and first excavated materials removal apparatus are provided separately.

Accordingly a high temperature gas generator for generating high temperature gas (for example, from 100 °C to 12QQ C air preferably from 400°C to 600 °C air) by the heating action of electric power (not illustrated, for example, a boiler by the arc heating action of the electric power) are provided separately.

The excavating side of an underground excavator possesses a square external form and circulating gas room (for example, thick air curtain room) is provided as said circulating gas room which adjoins the excavating underground.

A blower (not illustrated a known blower) in the first excavated materials removal apparatus circulates gas of said circulating gas room from the upper end entrance to lower end exit of the underground excavator.

A square honeycomb nozzle with a detecting means arranged in the center area is movably mounted horizontally in the excavating side of the underground excavator as a kinetic energy transformer for changing high temperature gas with fine materials generated by the heating action of the electric power into kinetic energy and for generating high temperature gas jet with fine materials which excavates the underground by passing through said excavating underground, and high temperature gas generated by said high temperature gas generator is supplied to said square honeycomb nozzle through respective nozzle valve (not illustrated a known valve).

Said high temperature gas with fine materials generated by said high temperature gas generator is changed into kinetic energy as high temperature gas jet with fine materials (for example from 100"C to 1200"C air jet with fine materials preferably from 400 °C to 600 C air jet with fine materials) by said square honeycomb nozzle and said high temperature gas jet with fine materials is passed through said circulating gas room and excavates the underground which said circulating gas room adjoins.

As said high temperature gas jet with fine materials (for example, from 100 °C to 1200 C air jet wAh fine materials, preferably from 400 t to 600 9C'ar jet with fine materials) excavates the excavating underground, the stones and the rocks become to possess the temperature which can be easily excavated by an underground excavator and the stones and the rocks are easily excavated by said high temperature gas jet with fine materials.

The detecting means arranged in the center area of said square honeycomb nozzle (not illustrated, for example, a known photo electrical means) detects the parts of which the underground are not yet excavated in said circulating gas room and the discharge angle of said square honeycomb nozzle is controlled to excavate said parts of which the underground are not yet excavated in said circulating gas room through said respective nozzle valve.

Most of the excavated materials by said high temperature gas jet with fine materials (for example from 100"C to 1200 °C air jet with fine materials preferably from 400 OC to 600 C air jet with fine materials) are flowed with said circulating gas by said blower and are removed before said circulating gas is circulated again by said blower.

The shooting angle of the circumferential nozzle of said square honeycomb nozzle are directed to the opposite end of the excavating underground in nearest position of said circulating gas room. The opposite end of the excavating underground can be excavated properly (for example, from the upper end parts to lower end parts of the excavating underground) by controlling discharge amount of high temperature gas jet from said circumferential nozzle through said respective nozzle valve, and excavated materials of the end of the excavating underground are dropped down to circulating gas Accordingly after all parts of the end of the excavating underground have been excavated, said underground excavator can move further to excavate the underground which is not excavated.

Another preferred mode of an excavated materials removal apparatus is as follows.

An excavated materials removal apparatus provides an entrance of circulating gas in one side and an exit of circulating gas in another side. Between said entrance and said exit, said excavated materials removal apparatus also provides a net of one-inch meshes, a net of loose meshes and a net of fine meshes with a hole arranged in the center area in due order.

Circulating gas with fine excavated materials passed through said hole arranged in the center area of said net of fine meshes is supplied to said high temperature gas generator through a pipe between said hole and said high temperature gas generator.

Said excavated materials removal apparatus also provides first bottom plate, second bottom plate and third bottom plate under said net of one-inch meshes, said net of loose. meshes and said net of fine meshes respectively and the excavated materials removed by said nets are dropped down upon said respective bottom plates.

And said bottom plates can incline in response to the signal detected by said detecting means that all the parts are excavated in said circulating gas room and return to the former position after the excavated materials are a31 transferred to the another provided respective receptacles.

Circulating gas of said circulating gas room by said another provided blower is ejected from said underground excavator and said ejected circulating gas is entered into said excavated materials removal apparatus through said entrance and comparatively big excavated materials are removed by said net of one-inch meshes and said comparatively big excavated materials are dropped down upon said first bottom plate.

Similarly comparatively small excavated materials or fine excavated materials are removed by said net of loose meshes or by said net of fine meshes respectively and said comparatively small excavated materials or said fine excavated materials are dropped down upon said second bottom plate or third bottom plate respectively.

Circulating gas with fine excavated materials passed through said hole arranged in the center area of said net of fine meshes is supplied to said high temperature gas generator through a pipe between said hole and said high temperature gas generator.

In response to the signal that all the parts are excavated in said circulating gas room detected by said detecting means, said bottom plates inclines to transfer said comparatively big excavated materials, comparatively small excavated materials or fine excavated materials upon said respective receptacle.

As the fifth preferred embodiment of an underground excavator of this invention, said heat energy supply apparatus and said first excavated materials removal apparatus are provided separately.

Accordingly said steam generator for generating superheated steam with fine materials (from 13Q C to i200 C superheated steam with fine materials preferably from 400 OC to 600 °C superheated steam with fine materials) by the heating action of the electric power (for example, a boiler by the arc heating action of the electric power) are provided separately.

The excavating side of an underground excavator possesses a square external form and circulating gas room (for example, thick air curtain room) is provided as said circulating gas room which adjoins the excavating underground.

A blower (not illustrated, a known blower) in said first excavated materials removal apparatus circulates gas of said circulating gas room from the upper end entrance to lower end exit of the underground excavator.

A square honeycomb nozzle with a detecting means arranged in the center area is movably mounted horizontally in the excavating side of the underground excavator next to said circulating gas room as a kinetic energy transformer for changing superheated steam with fine materials (from 120 °C to 1200 °C superheated steam with fine materials preferably from 400 C to 600 °C superheated steam with fine materials into kinetic energy and for generating superheated steam jet with fine materials which excavates the underground by passing through said excavating underground, and said superheated steam generated by said steam generator is supplied to said square honeycomb nozzle through respective nozzle valve (not illustrated a known valve).

Superheated steam generated by said steam generator is changed into kinetic energy as superheated steam jet with fine materials (for example from 120"C to 1200 C superheated steam jet with fine materials preferably from 400 C to 600 C superheated steam jet with fine materials) by said square honeycomb nozzle and said superheated steam jet with fine materials is passed through said circulating gas room and excavates the underground which said circulating gas room adjoins.

Accordingly the stones and the rocks become to possess the temperature by said superheated steam jet which can be easily excavated by an underground excavator and the stones and the rocks are easily excavated by said superheated steam jet with fine materials.

The detecting means arranged in the center area of said square honeycomb nozzle (not illustrated, for example a known photo electrical means) detects the parts of which the underground are not yet excavated in said circulating gas room and the discharge angle of said square honeycomb nozzle is controlled to excavate said parts of which the underground are not yet excavated in said circulating gas room through said respective nozzle valve.

Most of the excavated materials by said superheated steam jet (for example from 19. 0 C t4 120û çC superheated steam jet preferAly from 400 °C to 600"C superheated steam jet) are flowed with said circulating gas by said blower and are removed before said circulating gas is circulated again by said blower.

The shooting angle of the circumferential nozzle of said square honeycomb nozzle are directed to the opposite end of the excavating underground in nearest position of said circulating gas room. The opposite end of the excavating underground can be excavated properly (for example, from the upper end parts to lower end parts of the excavating underground) by controlling discharge amount of superheated steam jet from said circumferential nozzle through said respective nozzle valve, and the excavated materials of the end of the excavating underground are dropped down to said circulating gas room and most of the excavated materials are flowed with circulating gas.

Accordingly after all parts of the end of the excavating underground have been excavated, said circulating gas room can move further to excavate the underground which is not excavated.

Further preferred mode of an excavated materials removal apparatus is as follows.

An excavated materials removal apparatus provides an entrance of circulating gas in one side and an exit of circulating gas in another side. Between said entrance and said exit, said excavated materials removal apparatus also provides a net of one-inch meshes, a net of loose meshes and a net of fine meshes in due order.

Said excavated materials removal apparatus also provides first bottom plate, second bottom plate and third bottom plate with a hole at the entrance side under said net of one-inch meshes, said net of loose meshes and said net of fine meshes respectively and the excavated materials removed by said nets are dropped down upon said respective bottom plates.

The fine excavated materials passing through said hole of said third bottom plate are dropped down to water through a pipe and said water is supplied to said steam generator.

And said bottom plates can incline in response to the signal detected by said detecting means that all the parts are excavated in said circulating gas room and return to the former position after the excavated materials are all transferred to the another provided respective receptacles.

Circulating gas of said circulating gas room by said another provided blower is ejected from said underground excavator and said ejected circulating gas is entered into said excavated materials removal apparatus through said entrance and comparatively big excavated materials are removed by said net of one-inch meshes and said comparatively big excavated materials are dropped down upon said first bottom plate.

Similarly comparatively small excavated materials or fine excavated materials are removed by said net of loose meshes or by said net of fine meshes respectively and said comparatively small excavated materials or said fine excavated materials are dropped down upon said second bottom plate or third bottom plate respectively.

As the sixth preferred embodiment of an underground excavator of this invention, said second heat energy supply apparatus and said first excavated materials removal apparatus are provided separately.

Accordingly said steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of electric power (not illustrated for example, a boiler by the arc heating action of the electric power) and high temperature gas generator for generating high temperature gas by the heating action of electric power (not illustrated, for example, a boiler by the arc heating action of the electric power) are provided separately The excavating side of an underground excavator possesses a square external form.

The circulating gas room which adjoins the excavating underground (not illustrated for example, a thick air curtain room) is provided as said circulating gas room which adjoins said excavating underground and said another provided blower in said excavated materials removal apparatus circulates gas of said circulating gas room from the right end entrance to the left end exit of the underground excavator.

Also an underground excavator provides means for melting steel balls entered from an entrance by the heating action of the electric power and an upper end exit for issuing molted steel to construct the continuous wall.

A honeycomb nozzle (not illustrated) is provided in the inside of the underground excavator as said kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet (for example wet steam jet preferably wet steam jet near by saturated steam jet) which excavates the underground by passing through the excavating underground. Said steam near by saturated steam or superheated steam or wet steam generated by said steam generator is supplied to said honeycomb nozzle through a respective nozzle valve (not illustrated a known valve), or said high temperature gas generated by said high temperature gas generator is changed to supply to said honeycomb nozzle through another respective nozzle valve (not illustrated a known valve).

Also the relative position and the shooting angle between said circulating gas room and said honeycomb nozzle is constructed to be changed.

Steam near by saturated steam or superheated steam or wet steam generated by said steam generator is changed into kinetic energy as steam jet (for example wet steam jet prefeffably wet steam jet near by saturated steam jet) by said kinetic energy transformer and said steam jet is passed through said circulating gas room and excavates the underground which said circulating gas room adjoins.

A detecting means (not illustrated a known photo electrical means) detects the parts of which underground are not yet excavated in said circulating gas room and the shooting angle of said honeycomb nozzle is changed to excavate said parts of which the underground are not yet excavated in said circulating gas room.

After an underground excavator has moved further to excavate the underground which is not excavated and before said underground excavator excavates the underground in said circulating gas room, said molten steel is issued from an upper end exit to construct the continuous wall.

After the continuous wall has been constructed, said steam jet begins to pass through said circulating gas room and excavates the underground in said circulating gas room.

When all the parts of the excavating underground in said circulating gas room are not yet excavated by said steam jet, said high temperature gas is changed to supply to said honeycomb nozzle by said another respective nozzle valve and the excavating underground becomes to possess the temperature which can be excavated easily and high temperature gas jet or steam jet can easily excavate said parts of which the underground are not yet excavated in said circulating gas room.

Most of the excavated materials by said steam jet (for example, wet steam jet preferably wet steam jet near by saturated steam jet) are flowed with said circulating gas of said circulating gas room by said another provided blower and are removed before circulating gas is circulated again by said another provided blower.

Besides, when said detecting means detects the signal that all parts of the excavating underground in said circulating gas room have been excavated, said honeycomb nozzle is arranged at the nearest position to said circulating gas room and the shooting angle is directed to the end of the underground.

The underground excavator of this invention can excavate the proper quantity of the end of the excavating underground (for example, from the upper end parts to the lower end parts) by controlling the discharge amount of steam jet through said respective nozzle valve and excavated materials of the end of the excavating underground are dropped down to said circulating gas room and most of the excavated materials of the end of the excavating underground are flowed with circulating gas.

Accordingly the underground excavator can move further to excavate the underground which is not excavated and before said underground excavator excavates the underground in said circulating gas room, said molten steel can be issued from an upper end exit to construct the continuous wall.

As the seventh preferred embodiment of an underground excavator for excavating a vertical shaft, said second heat energy supply apparatus and said first excavated materials removal apparatus are provided separately.

Accordingly said steam generator for generating steam near by saturated steam or superheated steam or wet steam by the heating action of electric power (not illustrated , for example, a boiler by the arc heating action of the electric power) and high temperature gas generator for generating high temperature gas by the heating action of electric power (not illustrated, for example, a boiler by the arc heating action of the electric power) are provided separately.

The excavating side of an underground excavator possesses a square external form.

The circulating gas room which adjoins the excavating underground (not illustrated, for example, a thick air curtain room) is provided as said circulating gas room which adjoins said excavating underground and said another provided blower in said excavated materials removal apparatus circulates gas of said circulating gas room from the right end entrance to the left end exit of the underground excavator.

Also an underground excavator provides means for melting steel balls entered from an entrance by the heating action of the electric power and an exit for issuing molted steel to construct the continuous wall of a vertical shaft.

A honeycomb nozzle (not illustrated) is provided in the inside of the underground excavator as said kinetic energy transformer for changing said steam near by saturated steam or superheated steam or wet steam into kinetic energy and for generating steam jet (for example, wet steam jet preferably wet steam jet near by saturated steam jet) which excavates the underground by passing through the excavating underground. Said steam near by saturated steam or superheated steam or wet steam generated by said steam generator is supplied to said honeycomb nozzle through a'respective nozzle valve (not illustrated a known valve), or said high temperature gas generated by said high temperature gas generator is changed to supply to said honeycomb nozzle through another respective nozzle valve (not illustrated a known valve).

Also the relative position and the shooting angle between said circulating gas room and said honeycomb nozzle is constructed to be changed.

Steam near by saturated steam or superheated steam or wet steam generated by said steam generator is changed into kinetic energy as steam jet (for example wet steam jet preferably wet steam jet near by saturated steam jet) by said kinetic energy transformer and said steam jet is passed through said circulating gas room and excavates the underground which said circulating gas room adjoins.

A detecting means (not illustrated a known photo electrical means) detects the parts of which underground are not yet excavated in said circulating gas room and the shooting angle of said honeycomb nozzle is changed to excavate said parts of which the underground are not yet excavated in said circulating gas room.

After an underground excavator has moved further to excavate the underground which is not excavated and before said underground excavator excavates the underground in said circulating gas room, said molten steel is issued from an exit to construct the continuous wall of a vertical shaft.

After the continuous wall of a vertical shaft has been constructed, said steam jet begins to pass through said circulating gas room and excavates the underground in said circulating gas room.

When all parts of the excavating underground in said circulating gas room are not yet excavated by said steam jet, said high temperature gas is changed to supply to said honeycomb nozzle by said another respective nozzle valve and the excavating underground becomes to possess the temperature which can be excavated easily and high temperature gas jet or steam jet can easily excavate said parts of which the underground are not yet excavated in said circulating gas room.

Most of the excavated materials by said steam jet (for example, wet steam jet preferably wet steam jet near by saturated steam jet) are flowed with said circulating gas of said circulating gas room by said another provided blower and are removed before circulating gas is circulated again by said another provided blower.

Besides, when said detecting means detects the signal that all parts of the excavating underground in said circulating gas room have been excavated, said honeycomb nozzle is arranged at the nearest position to said circulating gas room and the shooting angle is directed to the end of the underground.

The underground excavator of this invention can excavate the proper quantity of the end of the excavating underground by controlling the discharge amount of steam jet through said respective nozzle valve (for example, more quantity of the end of the excavating underground by controlling the discharge amount of steam jet at deeper vertical shaft).

After an underground excavator has moved further to excavate the underground which is not excavated and before said underground excavator excavates the underground in said circulating gas room, said molten steel is issued from exit to construct the continuous wall of a vertical shaft. As the thickness of the continuous wall of a vertical shaft becomes more at deeper vertical shaft, the continuous wall of a vertical shaft becomes stronger at deeper vertical shaft.

Accordingly the underground excavator can move further to excavate the underground which is not excavated and before said underground excavator excavates the underground in said circulating gas room, said molten steel can be issued from an exit to construct the continuous wall of a vertical shaft.

Still another mode of this invention is an underground excavator with said steam generator and/or said gas generator and further mode of this invention is an underground excavator with said blower and still further mode of this invention is an underground excavator with said steam generator and/or said gas generator and said blower.

Said excavated materials removal means for removing excavated materials before said circulating gas is circulated again by said blower can be installed in an underground excavator or can be provided separately as an excavated materials removal apparatus.