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METHOD FOR AREA-BASED COAL ROCK WATER INJECTION SEEPAGE-DAMAGE-STRESS COUPLING VALUE SIMULATION
METHOD FOR AREA-BASED COAL ROCK WATER INJECTION SEEPAGE-DAMAGE-STRESS COUPLING VALUE SIMULATION
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机译：基于面积的煤岩注水渗流-损伤-应力耦合数值模拟方法
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摘要
Disclosed is a method for area-based coal rock water injection seepage-damage-stress coupling value simulation, comprising: establishing a coal seam model according to a geological survey resu performing area division and respectively simulating coal rock water injection seepage of a non-mining induced disturbance area and a mining induced disturbance area; in the non-mining induced disturbance area, performing programming to compare tension-shear torque values of meshes to determine whether deformation or even fracture occurs to coal rock under the action of water pressure stress; simultaneously simulating a coal fracture process using a meshfree method and simulating a seepage process using a boundary element method, wherein the advantages of the two simulation methods are combined on a micro scale; and in the mining induced disturbance area, respectively performing simulation using two mathematic models, i.e., the N-S equation and the Darcy's law, to accurately simulate coal damage and a water transfer law during an area-based coal rock water injection process. The method provides a solid data basis for coal seam water injection, greatly reduces the possibility that coal is crushed into dust particles, decreases the production amount of coal dust, and ensures the security of coal seam mining.
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