高瓦斯煤层群开采被保护层工作面采动应力演化数值模拟研究

Numerical simulation research on the dynamic stress evolution of the working face of the protective layer in the mining of high gas coal seam

本文以某煤矿三采区一个工作面为原型,用FLAC3D模拟保护层开挖100m、200m以后被保护层X方向、Y方向、Z方向应力变化规律。根据得出的应力演化规律可以有效判断被保护层瓦斯释放和运移情况,可以为被保护层瓦斯治理工作提供指导,对于煤层其他条件类似的工作面也有一定的参考意义。

In this paper, we take a workface of a coal mine as prototype. The mining stress distributions ot underlying coal seam are researched using FLAC3~ simulation software during mining overlying coal seam 100m and 200m. According to results of the mining stress we can research the gas releasing and transporting situation of protected coalbed. Simulation shows that the result can not only provide guidance to gas prevention, but also provide mode for other working face with similar conditions.