The Impact of Different Panel Layout Methods on Mining Subsidence Under Repeated Mining Conditions
With the development of deep coal mining,surface subsidence caused by repeated mining has significantly impacted the ecological and geological environment of mining areas.In order to study the impact of different panel layout methods on mining subsidence under repeated mining conditions,a coal mine in Shanxi Province was chosen as the research object.By combining the engineering geological conditions of the study area and using MIDAS GTS/NX for numerical simulation analysis,the surface subsidence values and overburden stress-strain characteristics of various 3D geological models during mining were compared.The conversion of underground mining space to surface subsidence under different panel layout methods was analyzed,and the impact pattern on mining subsidence was summarized.The results show that the vertical parallel panel layout causes smaller mining subsidence compared to the vertical perpendicular layout.During the repeated mining process,on one hand,the underground mining space formed by the vertical parallel panel layout is smaller than that of the vertical perpendicular layout;on the other hand,the disturbance to the"stress arch"caused by the vertical parallel panel layout is smaller.Therefore,when the panels are vertically parallel arranged,it can effectively reduce the conversion of underground mining space to surface subsidence and mitigate the impact of mining subsidence.Under the conditions allowed by the working conditions,the vertical parallel panel arrangement should be adopted as much as possible to reduce the surface subsidence caused by repeated mining.
万方数据
维普
