深井大断层工作面围岩应力数值模拟

Numerical Simulation of Stress Distribution Law of Surrounding Rock of Large Fault in Deep Mine

运用FLAC3D数值模拟软件对首采区应力进行了数值模拟,巷道两帮应力集中程度较高,高于垂直应力;巷道底部岩层交界面及两侧边缘位置应力集中程度特别高,顶板两侧肩角应力集中程度明显,容易切顶冒落;巷道顶、底板5 m左右水平应力高度集中。分析得到顶板岩层的运移规律:当工作面沿断层边缘或者朝向断层方向开采,临近断层侧超前支撑压力与原岩构造应力叠加强烈,矿压显现将明显增加。

Used the numerical simulation software FLAC3D,simulated the first mining area stress distribution,the stress concentration degree of roadway is higher than that of vertical stress; stress concentration degree of the bottom o is very high. The roof is obvious and easy to cut and fall,because of the stress concentration is too high. The horizontal stress concentration in the top floor of the roadway is about 5 m. The migration law of the roof strata in each numerical simulation section is analyzed： When the working face is mined along the fault edge or directed toward thedirection of the fault. The leading support pressure of the working face near fault side and the tectonic stress of the original rock is strengthened, and the rock pressure appearance will increase obviously.