房式开采煤柱回收时地表移动模拟研究

摘要

许村煤矿即将布置的工作面是为回收旧房式开采所遗留的煤柱，条件比较复杂。运用有限差分软件FLAC3D模拟分析了在回收煤柱时所引起的地表移动过程，通过提取和分析数据，得出最大下沉点位于采空区中心上方的地表处，最大下沉量为120mm，煤柱全部回收时所引起的地表移动范围为736m×610m，因此，在修建地面构筑物时，应尽量避免在此地表移动范围之内。%One of the Xucun mine's working face which is about to set is to recycle coal pillars that is left over in the old chamber mining.The condition is very complicated. This article analyzes the process of surface movement during the process of pillar extraction in chamber mining by the finite difference software. By extracting and analyzing the data, it is concluded that the largest subsidence point is located in the center of the earth's surface above thegoaf,and the largest subsidence is 120mm. When all of coal pillars are recycled,the range of earth's surface movement is 736m×610m. Therefore, building the abovegroundstructures should avoid as far as possible in the range of surface movement.