Abstract:
Aiming at the influence of mining in Baode Coal Mine on ecological environment and village relocation in gully terrain, it is considered to use on-site measurement and numerical simulation methods to study on the characteristics of surface subsidence caused by comprehensive mining in gully terrain.The results show that the measured maximum ground subsidence after mining at the 81306 working face is 3 158 mm, the sinking coefficient is 0.53, the mining influence range is 190 m, the fracture angle is 83°, the movement angle is 78°, the boundary angle is 68°, and the mining influence degree along with range are significantly larger than in traditional conditions.Combined with numerical simulation, it is found that the mining subsidence will increase abnormally when the gully terrain is directly above the mining boundary.The main reason is that the underground mining leads to a certain sliding phenomenon on the overlying gully slope.Based on that, the control measures of surface subsidence are proposed.The research results provide reference for the reasonable selection of mining boundary under constructions in gully terrain and the subsidence control under similar conditions.