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WO/2012/171155A1 |
A constant-resistance and large deformation anchor cable and a constant-resistance device are provided. The constant-resistance and large deformation anchor cable comprises cables (7), an anchoring device (13), a loading plate (12) and c...
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WO/2012/167308A1 |
An improved method for installing a self-drilling rock bolt (10) as well as components and tools for use in the installation of such bolts is disclosed. The rock bolt (10) has a central bore (14), a drill bit (18) mounted at one distal e...
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WO/2012/162908A1 |
A method for preventing shield casing catching due to too large frictional resistance in earth pressure balance shield is provided. The method involves carrying out real-time monitoring to the earth voltage signal between the shield casi...
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WO/2012/162720A1 |
A coal caving system including a canopy for supporting a mine roof and a conveyor positioned beneath the canopy which also includes a rear canopy with a slider door for selectively caving coal onto the conveyor, the system further includ...
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WO/2012/166905A2 |
A tunneling apparatus includes a drill head and a steering shell. The drill head includes a main body having a distal end and an oppositely disposed proximal end. The steering shell is disposed at the distal end of the drill head and is ...
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WO/2012/155727A1 |
Disclosed in the present invention is a water conveyance tunnel with a prestressed composite lining for shield tunnel comprises an assembled segment ring which is formed by shield construction and is an ordinary reinforced concrete outer...
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WO/2012/146062A1 |
A construction method for indirectly heating recoverable anchors comprises the steps of laying an anchor body (1), whose external surface is bond with a cover (2) and inside which a cavity (3) is contained, in soil body or rock reinforce...
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WO/2012/146148A1 |
A mining elevator rigid guide rail and layout structure thereof, the guide rail comprising steel rails (3), a steel rail beam support (4), and sliding guides (2); the sliding guides (2) are respectively disposed on an elevator car (1) an...
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WO/2012/140222A1 |
The invention relates to a method for carrying out nondestructive drilling with a high diameter D1 in a drilling area, including the steps of: a) carrying out a first guide drilling with a diameter D2 smaller than D1; b) making a cylindr...
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WO/2012/138825A1 |
A cable bolt assembly incorporating a head that distributes loads and minimizes the risk of potential failure caused by cable bolt head protrusion through the load bearing plate due to plate deformation. A flush seat cable bolt head incl...
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WO/2012/083342A9 |
Disclosed is a rock bolt comprising an elongate shaft extending between opposite leading and trailing ends and a deformed section disposed proximal to the leading end, the deformed section being configured such that a protrusion extends ...
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WO/2012/126042A1 |
An inflatable friction bolt (101) comprises a friction bolt leading portion (101A), friction bolt central portion (101B) and friction bolt trailing portion (101C). The friction bolt leading portion (101 A) has a surface feature (106) or ...
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WO/2012/120159A1 |
The invention relates to a system for managing the supervision of excavation using a tunnel boring machine by means of dynamic tunnel control. The system includes a central unit remotely connected to a plurality of excavation control nod...
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WO/2012/114249A2 |
A method for tunnelling uses equipment comprising a tubular structure (10) with a substantially empty tubular cavity corresponding to the cross section of the tunnel to be constructed. The front portion (13) of the tubular structure is p...
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WO/2012/115568A1 |
The present invention concerns a method for shaft sinking during work in a mine with the aid of a shaft suspension framework (1) that comprises a crane arm (13) with a wire winch (24) from which a platform (33a) that can be raised and lo...
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WO/2012/115569A1 |
A method for the emergency rescue of personnel who are carrying out shaft sinking during work in a mine with the aid of a shaft suspension framework (1) that is provided with displacement means (3) and that can be displaced with the aid ...
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WO/2012/115858A2 |
A pressure-compensated cutter assembly for a tunnel boring machine includes a shaft a cutter ring assembly rotatably mounted on the shaft, and first and second end retainers non-rotatably attached to the shaft. Rotary seal groups, immers...
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WO/2012/113976A1 |
The invention relates to a rock bolt to be installed into a borehole (1) drilled in a rock, wherein an expansion member (9) of the rock bolt includes an internal second cone abutment surface (12) in the interior of the expansion member i...
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WO/2012/109700A1 |
A machine (23) that is operable to drill passages in a surrounding rock layer and insert bolts therein. The machine (23) is operated by an operator (24) that stands on a platform (25) that is preferably secured to a rail upon which the m...
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WO/2012/098531A1 |
The present invention relates to a pipe jacking apparatus, and method therefor, that can jack pipes upwardly at an adjustable inclination, allowing pipe jacking to be carried out at various high inclination angles, for example to be able...
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WO/2012/089230A1 |
Face equipment for mechanical extraction in longwall mining, in particular in underground coal mining, having a face conveyor arranged along the mine face, having an extraction means which can be displaced along the face conveyor, and ha...
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WO/2012/083365A1 |
The present invention relates to a rock bolt 10 for use in stabilising a rock face. The rock bolt 10 comprises a body 12 having a plurality of elongate lobes 22 spaced apart by substantially resilient channel means. The rock bolt 10 is f...
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WO/2012/083400A1 |
The present invention relates to the process of nucleation and growth of calcium silicate-based nanocrystals and the toughening of the cement materials resulting from the in situ growth of said crystals during the hydration reaction in t...
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WO/2012/086904A1 |
The present invention relates to a method and related devices for carrying out TBM excavation and expansion blasting, which uses a blast protector and a cart to expand a pilot tunnel by blasting after the pilot tunnel has been formed; an...
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WO/2012/083317A1 |
This invention relates to a hydraulically expandable rock bolt constituted by a tubular shaft 12 that is longitudinally folded in on itself to define a groove 18. In use, the tubular shaft 12 is expanded from an inoperative, unexpanded c...
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WO/2012/077941A2 |
The present invention has an object to design a concept of a drainage tunnel in which water pressure has not been considered, unlike the prior art which relates to a concept of an undrained tunnel in which water pressure has been conside...
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WO/2012/072990A1 |
A liquid displacement device for a toilet cistern, comprises one or more containers adapted to displace a liquid within a toilet cistern; a hook for suspension of the containers within the toilet cistern, the containers being attached to...
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WO/2012/071625A1 |
The invention relates to a nut tensioning system that enables a high tension or high pre-tension force to be applied to bolts, rock bolts and self-drilling rock bolts. The invention comprises a mechanical two stage nut assembly, whereby ...
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WO/2012/065878A1 |
A description is given of a two-component mortar composition having a curable resin component having a content of at least one free-radically polymerizable resin, fillers, accelerators, stabilizers and optionally further conventional mor...
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WO/2012/059868A1 |
An apparatus for spraying liquid substances, such as paints or water, on the inner walls of tunnels, comprising a plurality of arms (8) each able to move in a different radial plane between a home position and a plurality of operating po...
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WO/2012/061842A2 |
A grouting system for anchoring a reinforcement in a mine includes a package that is a tubular member formed of polymer film and has discrete first and second compartments. Hardenable cementitious material that is a hydratable substance ...
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WO/2012/058706A2 |
The invention relates to a full face tunneling machine (1) comprising a base frame (2) having a chassis (13), and at least one cutting system (9). Said cutting system comprises at least one first cutting device (11, 24) having a tool sup...
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WO/2012/056393A1 |
This invention relates to a mine support, and more particularly but not exclusively, to a mine prop which is extruded from a plastic material. The mine prop includes a first elongate tubular structure made from an at least partially poly...
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WO/2012/058341A1 |
A method of forming a partitioned package for grouting for an anchoring system for a mine includes pumping a mastic into the package through a fill tube while a processing lubricant is separately introduced onto an inner wall of the fill...
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WO/2012/052571A1 |
The invention relates to a temporary support structure which provisionally supports the rail tracks (12) in use when work is carried out under the tracks, such as the jacking of a box (13) of reinforced concrete for eliminating a railroa...
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WO/2012/051693A1 |
An intrinsically safe supply for supplying back-up power during a power-out event incorporates one or more rechargeable fuel cells. The power supply is provided with switching circuitry operable to provide an output back-up current from ...
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WO/2012/053965A1 |
The present invention relates to a rock bolt hanger system for hanging mining services from the end of a rock bolt that has been installed through the rock face of a body of rock. The rock bolt has an elongate shaft which has leading and...
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WO/2012/046052A1 |
A pin or male member for a coupling device is disclosed. The pin may comprise an elongate non-metallic bar (2) and an elongate metal bar (25). The elongate non-metallic bar (2) has a first end (4), a second end (5), a central portion (9)...
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WO/2012/044091A2 |
The present invention provides a device and a method for constructing an underground structure, which can improve workability and shorten working hours. The invention comprises: a retaining wall which is formed on a circumferential face ...
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WO/2012/035481A1 |
An integral hoisting cable arrangement for a shaft maintenance device is provided, the cable arrangement having a first end that is connectable to the shaft maintenance device and a second end that is connectable to a hoist drum to enabl...
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WO/2012/036365A2 |
The present invention relates to an apparatus for inspecting the surface of the concrete lining of a tunnel, and to a method for same, and more particularly, to an apparatus for inspecting the surface of the concrete lining of a tunnel w...
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WO/2012/034181A1 |
A grout plug 10 for plugging a drill hole 20 in a mine. The plug 10 comprises an elongate sleeve 12 of porous material adapted to be received in a drill hole 20 and a volume of dry grout material 14 in particulate form. The plug 10 also ...
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WO/2012/032491A1 |
According to a first aspect of the invention there is provided a shaft maintenance device. The device comprises a support frame comprising a plurality of suspension points for allowing the support frame to be suspended by an overhead gan...
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WO/2012/027802A1 |
An anchoring assembly (201) is disclosed for anchoring a bolt such as rock bolt within a borehole, including a cam member (202) mounted to pivot relative to the bolt from a closed position aligned with the bolt to an expanded position of...
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WO/2012/028051A1 |
A support system for a large karst cave tunnel comprising a column support structure and a frame tunnel structure, wherein the column support structure being arranged on two sides of the tunnel in the karst cave for supporting the top (2...
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WO/2012/029012A2 |
This invention relates to a bearing plate assembly for a rock anchor. The assembly includes a steel bearing plate defining a central protuberance and at least one hole through the protuberance for receiving through a centre of the bearin...
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WO/2012/031094A2 |
A system for constructing a support column includes a mandrel with an upper portion and a tamper head. A feed tube extends through the mandrel for feeding flowable material to the head. The tamper head includes a lower enlarged chamber w...
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WO/2012/024938A1 |
A cutting device with the function of changing diameter in a small range for a soft rock shield machine is composed of a cutter disk (40), cutters mounted on the cutter disk, a telescoping mechanism for an edge scraper, a hydraulic contr...
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WO/2012/023101A1 |
This invention relates to an anchoring device and more particularly but not exclusively, to a rock anchor for use in a mining environment, and which combines the functionality of a split set and an attachment anchor. The anchoring device...
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WO/2012/020451A1 |
Provided is a low-cost surveying device for a pipe-jacking method, which can stably survey even tunnel paths wherein a tunneling machine (205) is made to advance in a curved line. The surveying device (1), used in the pipe-jacking method...
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