综采工作面覆岩应力分布及运移规律分析

Analysis of stress distribution and migration law of overlying strata in fully-mechanized working face

分析了综采工作面覆岩应力分布及运移规律,主要研究了不同工作面推进距离下上部覆岩的应力分布及上覆岩层运移规律。研究得出:随着工作面推进,产生的集中应力逐渐向煤层底板和前方扩展,支承压力的峰值点位置先增加后逐渐稳定,工作面上覆岩层逐渐垮落,垂直位移和水平位移逐渐增加,上覆岩层围岩运动的影响范围也逐渐增大。

The stress distribution and migration law of overlying strata in the fully-mechanized mining face were analyzed.The stress distribution of the upper overlying strata and the overlying strata migration law under different working face advance distances were mainly studied.It was found that as the working surface advances,the concentrated stress generated gradually expands to the floor of the coal seam and forward.The position of the peak point of the supporting pressure increases first and then stabilized.The overburden on the working surface gradually collapsed and the vertical and horizontal displacements increased.The range of influence of surrounding rock movements of overlying strata had gradually increased.