Surface Subsidence Law of Mining under Gully in Hongshuliang Coal Mine
Taking the 6105 working face of Hongshuliang Mine in Zhungar Coalfield as the re-search object,a surface GNSS intelligent observation station was established to study the surface subsidence law of the working face after mining by integrating the measured data and probability integral method.The results show that the maximum surface subsidence of the working face is 7 797 mm.After the fully-mining,the boundary angle is 66°,the moving angle is 70°,and the fracture angle is 72°.The prediction model based on the probability integral method is consistent with the measured data.We established a numerical calculation model of different gully parame-ters to study the influence of gully on surface subsidence.The results show that when the mining boundary is below the middle of the gully slope,it has the greatest impact on the surface subsid-ence,and the depth and slope of the gully positively correlate with the surface subsidence.
surface subsidencemining under gullyshallow buried coal seamprobability in-tegral methodnumerical simulation
万方数据
维普
