近距煤层综采工作面矿压显现规律

Strata Behavior Law at Fully Mechanized Mining Face in Close Coal Seams

962工作面是海孜煤矿86采区9#煤层首采面,为了了解工作面矿压规律,对962工作面进行了矿压观测,分析了在近距煤层开采过程中,工作面来压显现规律、支架分布特征及运行情况、支承压力分布规律及围岩破坏特征,结果表明,受762工作面开采影响,沿962工作面倾斜方向来压具有差异性,且来压强度较小,持续时间较长,矿压观测同时表明,回采巷道围岩移动变形仍属有限,现有支护能满足安全开采要求。

The 962 working face is the first coal face of the 9# coal seam in 86 mining district in Haizi Coal Mine. In order to research the strata behavior of the working face, strata behavior observation is carried out in 962 working face, the article analyzes the laws of strata behavior of fully mechanized working face, support load distribution and running condition, the law of the abutment pressure dis- tribution and damaged characteristics of surrounding rock through observing the pressure appearance in the course of the mining for close distance coal seams. The results show that the pressure is different along with the tilt direction in 962 mining face ; the pressure strength is small and a longer duration when it affected by the 762 working face mining. Meanwhile, the results of strata behavior observation show that the movement and deformation of tunnel surrounding rock is still limited, the existing supporting can meet the requirements of safe mining.