8results about How to "Improve mining safety" patented technology

The invention discloses a coal underground combustion gasification and carbon dioxide sequestration mining treatment method. The method comprises the steps that S1, gas injection fracturing is conducted, specifically, fracturing gas is introduced through a gas outlet well to enable a coal seam corresponding to a gasification to-be-mined area to form a fracturing seam net; s2, combustion gasification: taking the bottom end of a gas inlet shaft of the furnace to mountain gas and the bottom end as a mining direction, discharging gas from the furnace, and discharging synthesis gas; and S3, sealing and closing the well: injecting carbon dioxide serving as displacement gas into the space to be sealed through the gas inlet well, collecting mixed gas through the gas outlet well, and then injecting high-pressure CO2 gas into the space to be sealed for sealing treatment. According to gas injection fracturing of a single furnace, a horizontal fracturing gas injection channel is adopted for carrying out gas injection fracturing treatment on the gasification to-be-mined area of the furnace located above to form a fracturing crack net, the upper furnace well and the lower furnace well can be jointly subjected to difference node follow-up according to the flow process and the difference of one flow node, and the sealing difficulty of the well and a combustion space area is reduced; and the mining efficiency is improved.

The invention provides a method for recovering a filling coal pillar of a roadway-along wall built by building a station on the ground. Comprising the steps of 1, forming a filling system; 2, a first tunneling roadway (4) is tunneled; 3, sealing and filling the boundary air guide way (3); 4, building a wall between the first tunneling roadway (4) and the second tunneling roadway (5), and filling the boundary air guide roadway (3); 5, the first tunneling roadway (4) is sealed and filled; and step 6, repeating the steps 2-5 in the same way, tunneling the third tunneling roadway (6), and filling the first tunneling roadway (4) until all coal is mined. According to the method, double-roadway tunneling is adopted, two emergency exits are provided for personnel during tunneling and filling, gaps of the goaf can be reduced through the slurry filling body, the possibility of gas accumulation is reduced, and therefore the risk of gas explosion is reduced; the single props and the flexible film hanging bags are used for supporting the top plate between the two roadways, the supporting engineering amount is reduced, and the labor intensity of workers and the engineering cost are reduced.

The utility model discloses a coal mine tunnel fault passing rapid supporting device which comprises bases distributed at the bottoms of the two sides of a tunnel, single-cylinder hydraulic props are fixedly arranged on the bases, a supporting top plate is fixedly arranged at the upper ends of the single-cylinder hydraulic props, and a supporting side plate is hinged to the end, close to the side face of the tunnel, of the supporting top plate. One end of the support top plate is hinged to the support top plate, the other end of the support top plate is hinged to an extension top plate, the other end of the extension top plate is internally connected with a butt joint plate in an inserted mode, the butt joint plate is used for butt joint to achieve closing, and a pressure monitoring mechanism is arranged on the upper surface of the support top plate. The pressure sensor collects roof pressure data in real time, and the roof pressure data is analyzed and processed by the controller to achieve real-time monitoring and early warning of the roof pressure. Meanwhile, the extension top plate is matched with the butt joint plate, the extension top plate is driven to turn over through the second hydraulic push rod, the position of the butt joint plate is adjusted through the fastening bolt, roadway top plates with different widths can be flexibly adapted, and fully-closed supporting is achieved.

This invention provides a method for calculating the critical stress of rockburst based on a weighted fusion of tension-shear composite fracture, relating to the field of rockburst prevention and control technology. The method first simplifies the stress-strain relationship of coal-rock mass into a bilinear constitutive relationship, establishing a bilinear elastic damage constitutive model of coal-rock mass and corresponding three-dimensional damage evolution equations. Then, based on a circular roadway, a dual-zone rockburst mechanical model is constructed. Next, the basic equations of the circular roadway rockburst mechanical model are constructed, further determining the deformation system equations under two ideal assumptions: tension fracture only and shear fracture only. Finally, based on the deformation system equations under these two ideal assumptions, the critical stress for rockburst is determined. This method overcomes the biases that may arise from a single fracture assumption and can more effectively predict the rockburst risk in deep coal mines.

The invention relates to the technical field of mining methods, and particularly discloses a mining method for a steeply inclined thick ore body, which comprises the following steps: horizontally digging a middle-section loading and transporting transverse roadway at the bottom in a to-be-mined ore block from a middle-section haulage roadway outside a footwall vein of the ore body to the bottom of the to-be-mined ore block in a direction perpendicular to the trend of the ore body, and enabling the middle-section loading and transporting transverse roadway to penetrate through the whole ore body, connecting with an air return drift outside the hanging wall vein of the ore body; meanwhile, a pseudo-inclined undercutting connection way is excavated from the middle-section haulage roadway to the position about 6-8 m above the bottom of the ore block for connection, and then an undercutting transverse roadway is excavated from the pseudo-inclined undercutting connection way and the boundary of the footwall of the ore body in the direction perpendicular to the trend of the ore body until the undercutting transverse roadway reaches the boundary of the footwall of the ore body; during caving mining, the mode that the ore blocks in the same middle section are mined one by one at intervals and the mode that the large-diameter deep holes are filled in the ore blocks are adopted, the ore mining safety is high, and dilution is low. And the large-diameter deep hole caving mining efficiency is high, the productivity is large, and large-scale productivity mining can be achieved through a small number of ore blocks.

The invention relates to the technical field of intelligent coal mining, and discloses an intelligent mining coal seam top and bottom plate contour map vectorization path design method which comprises the following steps: step 1, determining a coal seam bottom plate contour line vectorization path; 2, vectorizing a coal seam roof contour line path; and step 3, cutting the vectorization path in the recovery work. According to the method, based on an existing coal seam bottom plate contour map, a coal seam top plate contour map formed by exploration drilling is combined, the two contour maps are further vectorized, in this way, the thickness ratio between the coal seam top plate and the coal seam bottom plate can be used as the width of a road, and the running height of two rollers of a coal mining machine corresponds to the height of the coal seam top plate and the height of the coal seam bottom plate; according to the design method, more accurate and efficient path planning is provided for intelligent mining, so that the intelligent process of the coal industry is promoted, and the production efficiency and the safety are improved.

The invention discloses a staged anchor cable forepoling method based on online monitoring. The staged anchor cable forepoling method comprises the following steps that P1, an underground forepoling monitoring scheme is formulated; p2, installing a forepoling effect monitoring system in the underground roadway; step P3, receiving a force signal and a displacement signal acquired by the underground advanced support effect monitoring system and performing signal analysis by the aboveground monitoring and analysis early warning system; and step P4, the monitoring and analysis early warning system automatically generates a report, if the report exceeds an early warning value, early warning information is issued, and a support designer is reminded to replace the support scheme. The mine production cost can be reduced, excessive investment of traditional one-time supporting is avoided through staged anchor cable advance supporting, accurate supporting is achieved according to requirements of different stages, waste of materials and equipment is reduced, and the supporting cost is reduced. Potential problems can be found and handled in time, maintenance and production halt loss caused by accidents are reduced, and the overall production cost of mining engineering is reduced from the long term.

The invention discloses an inclined thin coal seam mining device and method, and belongs to the technical field of coal mining. The inclined thin coal seam mining device comprises a vehicle body, a water cutting system and a plurality of drill rods; the vehicle body is rotatably and adjustably provided with a drill rod conveying driving mechanism; the water cutting system is connected with the tail of the first drill rod through a rotary joint; the head end of the third drill rod is connected with a drilling cutting head, and the periphery of the third drill rod is fixedly connected with a stirring falling device. The drill rod conveying driving mechanism drives a drill rod with a drill cutting head to conduct inclined upward deep drilling in the mode that second drill rods are intermittently added, the water cutting system rotates through the drill cutting head to conduct water cutting, a cutting gap in a spiral face shape is formed, and the coal seam is smashed and falls off through the stirring and falling device. Through cooperative actions of drilling, spiral path water cutting and smashing and falling, one-time hole channel mining of the inclined thin coal seam is carried out, the efficiency and safety of inclined thin coal seam mining are effectively improved, and the whole device is single, convenient to use and low in cost.