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Matches 1 - 50 out of 6,614

Document Document Title
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 ...  
WO/2018/233320A1
Disclosed are a coal mine underground reservoir and a multi-layer grouting-based anti-seepage reinforcement method for a reservoir dam, applicable to the field of coal mine underground construction. The method comprises: determining the ...  
WO/2018/227898A1
Provided are a physical-chemical complex retardant for controlling the spontaneous combustion of low-rank coal, a preparation method therefor, and the use thereof. The complex retardant consists of a chelate and attapulgite, wherein the ...  
WO/2018/227708A1
A coal mine safety monitoring method, the method comprising: receiving first safety data of a coal mine that is acquired by detecting devices (701) in different regions of the coal mine at a first acquisition frequency, the first safety ...  
WO/2018/220259A1
A drainage system of a tunnel for underground construction to be arranged on an upward wall and/or a roof of the tunnel is provided. The drainage system comprises a draining pipe for leading the water away. The drainage system further co...  
WO/2018/218378A1
The invention relates to distension techniques for neutralising the rock explosions that often occur during the construction of underground works located in environments exposed to high stress fields, such as caverns, main tunnels or bra...  
WO/2018/222062A1
The invention belongs to the field of chemistry and refers to an agent applied for fire extinguishing, fire protection, suppression of all types of absorbent and low absorbent dust and prevention of forming of ice and snow layers and the...  
WO/2018/220343A1
A heat exchanger having separate conduits through which heat exchange fluid and air may be flowed. The conduits are arranged so that heat can be exchanged between the heat exchange fluid and the air. A means for generating airflow in the...  
WO/2018/223028A1
Methods and systems of controlling a pitch angle of a shearer. A controller receives a sensor signal indicative of the pitch angle of the shearer, and receives a target pitch profile defining a plurality of target pitch angles for differ...  
WO/2018/214659A1
Disclosed is a novel process for controlling downhole gas in an abandoned mine. The process comprises the steps of 1) before an abandoned mine is closed, branching downhole drifts (1, 2, 3) are blocked, and steel pipe holes are prepared ...  
WO/2018/210614A1
In order to temporarily subdivide tunnels or tubes (31-33) of traffic routes (30) on which means of transport travel into individual sections, a separating element (10) is described, which is inflatable and fills the tunnel or the tube s...  
WO/2018/201706A1
The present invention applies to projects such as regional outburst elimination for coal roadway driving or for coal extraction, and discloses a method for efficient gas drainage in coal roadway strips and regional outburst elimination b...  
WO/2018/201714A1
Disclosed is an accurate extraction method for a coal mine gas, for improving the accuracy of coal mine gas extraction design and construction and ensuring borehole extraction efficiency. The method comprises: firstly, using a gyroscope ...  
WO/2018/203023A1
A ventilation device that enhances the effective longitudinal thrust of a fan assembly installed within a tunnel or other internal space. The nozzle trailing edge (6) is tilted so that it forms an angle (13) with respect to the fan centr...  
WO/2018/192066A1
A method for controlling a subsidence area caused by underground mining in an adjoining open-pit mine, applied in an open-pit and underground coordinated mining process. In the method, a ground subsidence area (7) caused by underground m...  
WO/2018/192067A1
A water disaster prevention and treatment design method for a mine taking a coal bed as a main aquifer. By determining the water discharge amount of a working face water discharging system, whether working face partial syncline exists, a...  
WO/2018/176892A1
Disclosed are a network integrated and coordinated control system and method for thin coal seam comprehensive mining and gas control. By optimising shearer selection and mining method, efficient mining on a joint coal and rock working fa...  
WO/2018/183834A1
A method for repairing in-ground tunnel structures including the steps of: a) cleaning the structure to be lined; b) installing a suspension cable along the top of the tunnel; c) suspending sheets of liner composite along the suspension ...  
WO/2018/171255A1
Disclosed is a networked preferential gas migration passage (17) construction and gas diversion drainage method, applicable to active construction of a networked fracture passage inside a ceiling (13) where a hard ceiling (14) covers a c...  
WO/2018/171254A1
Disclosed is a stepped-type construction method for a preferential gas migration passage of a coal seam stope, particularly applicable to gradual construction of a gas migration passage inside and outside stope coal and rock mass of a de...  
WO/2018/166243A1
A method for determining size of and spacing of artificial ore pillars for room mining pillar recovery, comprising: dividing, in a room mining pillar recovery process, a process of supporting a roof with room mining pillars into a stage ...  
WO/2018/165213A1
A link for a conveyor chain includes a first portion and a second portion laterally spaced apart from the first portion. The first portion includes a first sprocket-engaging pin, and the second portion includes a second sprocket-engaging...  
WO/2018/161469A1
A coal bulk permeability enhancing method using heat injection performed by combining microwaves and hot air is disclosed. A borehole (2) is formed in a coal seam (1), a microwave antenna (4) is connected to a front end of a coaxial wave...  
WO/2018/165217A1
A conveyor chain includes first link, a second link, a connecting link, a first flight, and a second flight. The first link includes a first side portion and a second side portion. The first side portion has apertures and a first drive p...  
WO/2018/160087A1
´╗┐For determining a location of a potential emergency in an area, a wearable monitor is placed on a user present within the area, which detects a physiological parameter of the user and generates a first signal, subsequently communicate...  
WO/2018/158447A1
The present invention relates to a system intended to be fixed under the ceiling (Pf) of a building in order to lay flexible ducting (Gs) under the said ceiling and set the said ducting, the said flexible ducting (Gs) being of the type c...  
WO/2018/156001A1
The present invention describes a method for measuring and mapping the concentration of harmful and explosive gases present in confined spaces in mines. Said method combines one or more nodes with sensors for different environmental vari...  
WO/2018/156003A1
The present invention describes a method for mapping optimum personalised routes for safe evacuation, based on gas diffusion algorithms, using fixed nodes disposed on tunnel walls that measure atmospheric variables such as toxic gas conc...  
WO/2018/156002A1
The present invention describes a method for estimating the state of alertness and consciousness in relation to a percentage of carboxyhaemoglobin (COHb) in the blood of persons who work in enclosed spaces and are exposed to intoxication...  

Matches 1 - 50 out of 6,614