上分层充填开采地表移动变形规律数值模拟研究

Numerical Simulation of Surface Movement and Deformation in Upper Stratified Filling Mining

充填开采技术是解决“三下”(建筑物下、铁路下、水体下)压煤开采问题的主要技术途径之一。为了探索上分层充填开采地表移动变形规律,以郭家滩煤矿2-2煤层为例,采用FLAC3D软件,构建数值模拟模型,对2-2煤层充填开采地表移动变形规律进行模拟分析。研究发现,相比于垮落法而言,充填开采各地表移动变形量均相对较小,从而大大减弱了对地表建筑物等的影响,能够有效保证地表建筑物的安全。

Filling mining technology is one of the main technical ways to solve the"under three"(under buildings,under railway,under water)coal mining problems.In order to explore the law of surface movement and deformation in upper stratified filling mining,FLAC3D software was used to build a numerical simulation model by taking 2-2 coal seam in Guojiatan Coal Mine as an example to simulate and analyze the law of surface movement and deformation in 2-2 coal seam filling mining.It is found that compared with caving method,the surface movement and deformation value of filling mining is relatively small,which greatly weakens the influence on surface buildings and can effectively ensure the safety of surface buildings.