峰峰矿区正断层活化造成地表异常沉陷影响因素研究

为了研究断层活化造成地表异常沉陷影响因素，建立了断层活化力学模型，并根据峰峰矿区地质条件利用数值模拟研究了断层倾角、煤层厚度、工作面推进长度、断层保护煤柱宽度、断层带充填物强度对地表沉陷的影响。研究结果表明：断层倾角越大，断层露头处地表下沉台阶落差越大，地表最大下沉值越大|煤层厚度越大，地表下沉值越大，断层露头处地表下沉台阶落差越大|工作面推进长度越大，地表下沉值越大，断层露头处地表下沉台阶落差越大，当工作面推进长度使地表下沉达到充分采动时，断层露头处地表下沉台阶不再增大|断层带充填物强度对地表沉陷影响不大。研究结果对分析断层影响下的地表沉陷规律具有一定借鉴作用。

Analysis of influencing factors of abnormal surface subsidence induced by fault activation in Fengfeng mine area

The surface subsidence has great difference when fault exists in overburden strata. To study the influencing factors of abnormal surface subsidence, the mechanism of fault activation was built and the relationship between abnormal subsidence with fault dip,advancing working length,mining height,protective coal pillar and strength of filling material in fault zone were studied by numerical simulation.The result shows that the step subsidence and maximum subsidence will increase with the fault dip as well as the mining height.The step subsidence will increase with the advancing working length when the advancing direction is non-full mining,while it will not increase when the advancing direction is full mining.The step subsidence will decrease with the protective coal pillar width increasing.The strength of filling material in fault zone has small effect on the surface subsidence. The research result has great significance of analyzing surface subsidence laws when the fault exists in overburden strata.