沿空留巷切顶卸压围岩稳定性分析

Stability analysis of surrounding rock with roof cutting and pressure relief in gob side entry retaining

为了解决原有支护下巷道围岩变形严重的问题,提出沿空留巷切顶卸压技术,利用数值模拟软件对切顶前后巷道围岩变形进行了分析,发现经过切顶卸压后,围岩的变形得到了大幅度的降低,有效保障了巷道的稳定性,同时对切顶高度对切顶效果进行了分析,得出最佳切顶高度为12m,为矿井切顶卸压提供一定的理论依据。

In order to solve the problem of serious deformation of roadway surrounding rock under the original support,this paper puts forward the technology of roof cutting and pressure relief in gob side entry retaining.This paper analyzes the deformation of surrounding rock before and after roof cutting by using numerical simulation software.It is found that the deformation of surrounding rock has been greatly reduced after roof cutting and pressure relief,which effectively ensures the stability of the roadway,and at the same time,the roof cutting height is used to cut the roof The effect is analyzed,and the best roof cutting height is 12 m,which provides a certain theoretical basis for roof cutting and pressure relief.