崩落法开采对塌陷区回填体沉陷影响的数值分析

摘要

运用UDEC软件对地下矿体采用崩落开采后塌陷区回填体的沉陷变化进行了数值模拟分析.结果表明,回填域内的位移呈“中间大,两端小”的现象,且位于矿体正上方的沉陷尤为显著,整个回填区域内似“V”形沉陷盆地,最大下沉值约为30 m.利用UDEC软件正确模拟与预测地下开采后地表回填体的运动规律,为矿区安全回填工作的顺利开展提供科学参考.%Numerical simulation analysis was conducted using UDEC for the laws of surface backfilling body by mining underground ore body. The results showed that the phenomenon of displacement in backfilling area was "the middle is bigger than both ends" and the top of the subsidence was particularly significant in backfilling area just above the ore body and there were "V-shaped" emergence basin in the backfilling area,the biggest subsidence value about 32 m. Simulation and forecast the motion laws of the backfilling body correctly caused by underground mining using UDEC, It is important to guide safety backfilling work smoothly.