Safety Evaluation and Analysis of Coal Mining under Reservoir
In order to analyze the impact of coal mining under reservoir on reservoir and surface,taking 32 mining area of a coal mine as an example,the research method combining theoretical calculation and numerical simulation was used to analyze the height of water-conducting fracture zone formed by overlying rock failure after coal mining.The maximum subsidence value and horizontal deformation value of a coal mine surface reservoir are obtained by probability integral method and numerical simulation.The results show that the height difference between the maximum elevation and the bottom of the water-guiding fracture zone is greater than 250 m,the water-guiding fracture zone will not affect the safety of the reservoir,and the maximum surface horizontal deformation is far less than the allowable deformation value,so it is safe to carry out coal mining under the surface reservoir.Through the safe mining of the working face in the 32 mining area,the rationality of the analysis method and the results are verified.
coal mining under reservoirwater-conducting fracture zonesurface settlementnumerical simulation
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万方数据
