过断层巷道顶板应力分布规律的数值模拟研究

Research on Numerical Simulation of Stress Distribution Laws of Gateway Roof Through Fault

回采巷道穿越断层的常用方案为:直接穿越断层后再挑顶起坡至上盘煤层;断层前起坡挑顶穿越断层。文中应用FLAC3D有限数值差分程序,分析了这两种不同方案下回采巷道上覆岩层超前应力、位移、塑性区的分布特征,并对这两种方案模拟结果进行了对比研究。

There are two schemes usually used for gateways cutting through fault. The one is to rip the roof to coal seam of the hanging wall after cutting through the fault directly, the other is to rip the roof to cut through a fault in front of the fault. FLAC3D finite value difference program is used to analyze the distribution characteristics of advance stress, displacement and plastic zone in the overlying rock of gateway cutting through fault under two different ways, and the simulation results of the two ways have been compared with each other.