Analysis and research of safety evaluation of coal mining under reservoirs
There are problems such as permeability disasters and severe surface subsidence in coal mining under water bodies.In order to analyze the impact of coal mining under reservoirs on reservoirs and the surface,taking the 32 mining area of Lugou Coal Mine in Zhengzhou mining area as an example,a research method combining theoretical calculation and numerical simulation was used to deter-mine the height of the water conduct zone formed by the damage of the overlying rock strata after coal mining.The maximum subsidence value and horizontal deformation value of Lugou Coal Mine surface reservoir were obtained by probability integral method and numerical simulation.The results show that the height difference between the maximum elevation and the bottom of the reservoir of the water con-duct zone is greater than 300 m,the water conduct zone will not affect the safety of the reservoir;the maximum surface horizontal de-formation 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 reservoirswater conducted zonesurface settlementnumerical simulation
万方数据
维普
