采动软弱覆岩结构下断层对覆岩破坏规律影响研究

Study on Mining under Weak Rock Structure Overlying Fault on Law of Overburden Destruction

复杂地质构造下软弱覆岩透水规律是一个极其复杂的物理力学和时间演化过程。本文以大平煤矿N1S1工作面为例,应用非线性有限元软件Midas(GTS),采用Morh-Coulomb准则,建立了二维有限元模型,结合N1S1工作面的实测数据,模拟研究了复杂地质构造下软弱覆岩中断层附近的应力场、断层附近的位移场、破坏场随工作面推进过程的分布演化规律。

The weak rule of permeable overburden rock under complicated geological structure is an extremely complex physical and mechanical time evolution. Taking N1S1 Face in Daping Coal Mine as an example, the nonlinear finite element software Midas（GTS）, using Morh-Coulomb criterion, the establishment of a two-dimensional finite element model, combined with the measured data N1S1 face, simulation of complex geological structure under soft cover rock stress field near the fault, the fault displacement field near the field with the destruction of face advance distribution evolution process.