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Matches 1 - 50 out of 6,685

Document Document Title
WO/2019/184147A1
A method for efficiently preventing impact ground pressure for a low gas-permeability coal seam, comprising the following steps: step I, measuring the coal mechanical property; step II, determining the highest gas injection pressure for ...  
WO/2019/184148A1
An efficient water injection method for a low-permeability coal seam, comprising the following steps: step 1, measuring the physical properties of a coal body; step 2, determining the highest gas injection pressure of high-pressure gas i...  
WO/2019/178679A1
Storage vessel, system and method for storing compressed gas are provided. A storage vessel for storing compressed gas comprises a wellbore provided in the subsurface; a casing placed within the wellbore and cemented to the formation, th...  
WO/2019/180101A1
The system (10) for reinforcing the wall (20) of a pipe comprises a rigid ring (30) and a seal (40), made of a viscoelastic material and forming an expandable wedge, the seal being intended to be interposed between the ring and the wall ...  
WO/2019/174188A1
Disclosed is a roadway-type cementing filling method for a nearly-horizontal coal seam, the method comprising the following steps: a filling roadway (3) is formed after the nearly-horizontal coal seam is mined by using roadway mining tec...  
WO/2019/172753A1
A method and sensor system for monitoring in time a geometric property of a gasket (32, 34) that sealingly interconnects two structural members (20, 21) of a subterraneous or immersed tunnel (10). The system includes a sensor (42) for me...  
WO/2019/167014A1
The subject of the invention is an airlock with a pneumatic orifice, characterized in that the orifice chamber (5) is located inside the tunnel (1), together with an inactive expansion element (4) made up of a flexible material consistin...  
WO/2019/161593A1
A monitoring and early warning method for electromagnetic radiation and underground sound of coal and rock dynamic disaster hazard, comprising the following steps: (1) calculating the weighted average P(t) of research parameters within a...  
WO/2019/160856A1
A roadway conduit system includes a roadway conduit section that includes a floor portion with roadway surface configured to receive traveling vehicles, a ceiling portion, and at least one sidewall portion coupled to the floor portion an...  
WO/2019/153618A1
Disclosed is a method for determining the optimal solution for mine ventilation network optimization. A ventilation network of the method has p nodes and b branches, a feasible solution for ventilation network optimization is expressed u...  
WO/2019/155350A1
The invention relates to a spray-agglomeration dust suppression system for underground mines, which consists of a combination of different sets of atomisers strategically distributed in the entrance of the tunnel and inside same, by mean...  
WO/2019/148528A1
A pontoon type tunnel shuttle platform (30), comprising a control device (301), a first winch (302), a second winch (303), a cable (304), and a carrying platform (305); the first winch (302) and the second winch (303) are correspondingly...  
WO/2019/148529A1
A tunnel wall-adhering shuttle platform (30) and a tunnel monitoring apparatus (100), the tunnel wall-adhering shuttle platform (30) being suited to shuttling in water in a tunnel (20) below a shield well (10), the tunnel wall-adhering s...  
WO/2019/140813A1
A roadway forming method by roadway widening and tunneling and filling a gangue paste in a thick coal seam, comprising: firstly designing the width of a packwall (2) and the width of a new roadway to be tunneled (1) according to the geol...  
WO/2019/141023A1
A method for determining a range of a dangerous rock formation of a roadway ceiling comprises: selecting a region where a tested pulling force limit is less than 1.2 times a designed support body anchoring force; in the selected region, ...  
WO/2019/136765A1
Disclosed is a typical dynamic coal mine disaster early-warning service method based on an SaaS mode. The method belongs to the field of coal mine safety, and comprises the following steps: deploying disaster early-warning server softwar...  
WO/2019/137073A1
Disclosed is a multi-stage pressure bearing permeable hole sealing method, comprising thefollowing steps: 1) performing multi-segment expansion hole sealing at a position to be sealed in a borehole, wherein the number of segments for exp...  
WO/2019/127330A1
Disclosed is a coal mine safety monitoring system. The system comprises an uphole part and a downhole part, the uphole part comprising a power source lightning arrester, a monitoring host and a standby monitoring host connected to a powe...  
WO/2019/119933A1
Disclosed is a method for protecting/purifying water by recharging iron-containing sewage into a stratum destroyed by coal mining. According to the method, iron-containing sewage recharging holes and oxygen-containing water/weak alkali w...  
WO/2019/114338A1
Provided is a safe blocking method for an excavation disturbance area of a high-level waste disposal repository roadway. Multiple groups of seal sections (3) are excavated on an original high-level waste disposal repository roadway wall ...  
WO/2019/114224A1
A bag-shaped filling structure for an underground coal mine and a use method therefor. The bag-shaped filling structure for an underground coal mine comprises a truss beam wall (3), a surface sealing layer of a bag-shaped structure, and ...  
WO/2019/116725A1
This control system for use during a tunnel fire comprises: measurement means 100l to 100n which are each placed in a plurality of management sections set in a tunnel and measure the gas concentration and/or the smoke concentration in th...  
WO/2019/109602A1
A short-face coal-pillar-free mining method having zero gangue discharge, applied to zero discharge gangue processing in a mine. The method comprises: selecting, according to actual scenarios of a mine, a region near a mine shaft, and ar...  
WO/2019/109654A1
Disclosed is a combined automatic explosion suppression method for a gas discharge pipe. The method specifically comprises the following steps: preparing an explosion suppression installation pipeline; connecting the installation pipelin...  
WO/2019/109535A1
Disclosed is a clean and efficient coal mining method, applicable to the field of solid mine waste processing. The method comprises: setting the width of short section work faces (11, 12) according to an amount of solid waste discharged ...  
WO/2019/105162A1
A microbial modification filling-based coal mining method, comprising the operation steps of performing ground microbial calcification on a filling material, conveying the calcified filling material to a goaf for tamping and filling, and...  
WO/2019/105161A1
A bedding borehole-based gas extraction method capable of avoiding air leakage, comprising two stages, i.e., building a main gas extraction system and building an auxiliary gas extraction system: firstly, a main gas extraction pipeline (...  
WO/2019/103521A1
A power supply device for tunnel construction, according to one embodiment of the present invention, comprises: a housing; a high voltage bushing provided on the outer surface of the housing and receiving high voltage power; a primary tr...  
WO/2019/099375A1
A chemical discharging fan system has a ducted fan adapted and configured to generate a flow of air from an inlet of the fan into a duct of the fan and through the outlet of the fan. A spray gun is arranged on the fan in the flow of the ...  
WO/2019/085001A1
A water drainage system and method. The water drainage system comprises: a water pump set (11, 21) provided with at least two water pumps, a control mechanism (12, 22) for controlling the operation of the water pump set (11, 21), and at ...  
WO/2019/085052A1
Disclosed is a method for filling coal mining to recover a residual coal pillar and controlling stability of a waterproof key layer. A cement-filling pumping device is arranged in a tunnel formed by a mined coal chamber; goafs at two sid...  
WO/2019/080219A1
A method for using a coal mine underground tunnel for compressed air energy storage: first reconstructing the cross section of the tunnel, specifically comprising: implementing high pressure grouting reinforcement of the rock mass surrou...  
WO/2019/075884A1
A coal mine down-hole borehole penetration improvement method based on controllable shock wave technology comprises: pushing a controllable shock wave generation apparatus (3) into a borehole; after a hole opening sealing device (4) is i...  
WO/2019/075885A1
Disclosed is a method of reforming a coal-bed gas well employing controllable shock waves in combination with surge water injection pressurization. The method comprises the following steps: 1) installing a wellhead four-way joint (1) and...  
WO/2019/072183A1
A coal seam secondary anti-reflection device by means of joint efforts of thermal disturbance and drilling gas explosion, comprising a microwave radiation system, a drilling gas detonation system, a gas injecting fire preventing and figh...  
WO/2019/071755A1
Disclosed are a measurement-while-drilling method and device for assessing outburst risk of a coal seam applicable to prediction of outburst risk and evaluation of gas drainage performance. The device comprises a compartment (20), a pres...  
WO/2019/071756A1
Disclosed are a measurement-while-drilling method and device for obtaining a coal seam gas parameter applicable to measurement of a coal seam gas/coal seam methane parameter while drilling and evaluation of gas drainage performance. The ...  
WO/2019/063872A1
A backfill slurry sampling apparatus (1), in which a sample portion of a backfill slurry flow is conducted to a sampling line (3) via a sampling valve (4). A sample positioning means (5) is provided, comprising a plurality of receptacle ...  
WO/2019/063033A1
The invention relates to a device (100) for preparing and spraying a construction material (10) for erecting a weather dam (1), and to a method for this purpose. The device (100) comprises a container (12) receivable on a vehicle (11), t...  
WO/2019/052594A1
The invention relates to a conveying and transport system for tunnel constructions, having a twin-rail overhead track system which comprises a roof-mounted track (1) consisting of two lines (2, 3) of rails (4) arranged parallel alongside...  
WO/2019/040980A1
In accordance with the present invention, there is provided a conveyor skirt system, the system comprising: a support member (33); a series of skirting panels (24) releasably fixed to the support member (33); a rail assembly (56) positio...  
WO/2019/042106A1
Disclosed are a fire-proof material, a fire-proof plate, a firewall structure for tunnels and a construction method. The fire-proof material comprises the following components in parts by weight: 20-35 parts of aluminium silicate; 20-35 ...  
WO/2019/042026A1
Disclosed is a protection pipe for a gas-extraction surface borehole in a mining area. The protection pipe for a gas-extraction surface borehole in a mining area is arranged inside a gas-extraction surface borehole in a mining area. The ...  
WO/2019/035717A1
The invention describes a foldable tube (1) for transporting a fluid in a similar fluid of similar pressure comprising a tubular flexible material, a skeleton comprising at least one elongated guide (2) made of a non- stretch and flexibl...  
WO/2019/029178A1
Provided is a new gas control technology for a ground pressure-relief borehole in an abandoned coal mine. The technology achieves the purpose of comprehensive treatment and utilization of abandoned coal mine gas by adopting the process o...  
WO/2019/015362A1
Disclosed are a shallow seam water conservation mining method and an application thereof. According to the method, in a working face, a plurality of pre-bored tunnels is vertically or obliquely demarcated from a main transport tunnel (1)...  
WO/2019/013657A1
Method of spontaneous mining induced seismic events prediction based on continuous measurements of the rotational Rayleigh wave parameters within the frequency band from 0,05 Hz to 10 kHz and appropriate transforming them aiming for iden...  
WO/2019/010907A1
A closed circulation system for improving operating efficiency of a gas drainage pump. A liquid inlet of a pneumatic diaphragm pump (13) is connected to a liquid outlet of a polymer drag reduction solution tank (9); a liquid outlet pipe ...  
WO/2019/000839A1
The present invention relates to the field of mining engineering. Provided is a monitoring method integrating three aspects of data relating to strata control, comprising: downhole pressure observation, in which a pressure monitoring dev...  
WO/2018/236730A1
A control system (400) for a material gathering mechanism (108) includes a gathering head (118) configured to gather material from a ground surface, a plurality of gathering members (120) configured to transport the material gathered by ...  

Matches 1 - 50 out of 6,685