浅埋大采高综采工作面矿压显现规律研究

Study on Ground Pressure Behavior Law of Shallow and Large Mining Height Fully Mechanized Face

以1901工作面为研究对象,对浅埋大采高综采工作面矿压显现规律进行理论分析,通过公式计算塑性区和弹性区支承压力大小。采用FLAC3D对工作面不同推采距离超前支承压力进行数值模拟,得到应力峰值大小、影响范围、峰值点到煤壁距离、应力集中系数。并采用钻孔应力计对工作面超前支承压力进行现场观测,结果表明观测结果与模拟数据基本吻合。

Taking 1901 working face as the research object, this paper theoretically analysed the law of strata pressure appearing in Shallow-Buried fully mechanized mining face with large mining height,and calculated the abutment pressure in plastic zone and elastic zone by formula. FLAC3D was used to simulate the advance abutment pressure of different mining distance in working face. The magnitude of peak stress,the range of influence,the distance from peak point to coal wall and the stress concentration factor are obtained. The borehole stress gauge was used to observe the advance abutment pressure of the working face. The results show that the observation results are basically consistent with the simulation data.