大倾角综采面巷道围岩钻孔窥视分析

Drilling Peep Analysis of Surrounding Rock at Large Inclined Angle Compound Mining Face

为确定塔山煤矿大倾角1302工作面回采巷道的围岩内部活动规律、离层及破坏范围,对巷道围岩稳定行进行评估,为优化支护方案提供参考,借助YTG20岩层记录仪对巷道围岩进行钻孔窥视监测。由监测结果可知,监测范围内没有出现明显的裂隙和大面积的破碎,锚固区内围岩分布呈现不均匀性。

In order to determine the inner activity rhythm,the separation and the damage extent of the wall rock in the gateway of drilling peep 1302 working face,Tashan Colliery,to evaluate the stability of the wall reck,and to offer reference for the optimization and support scheme,this paper did peep monitoring to the wall rocks in the haulage with the assistance of YTG20 rock stratum recorder.It can be seen from the monitoring results that there is no obvious cracks and large-area crushing in the monitoring scope, and the wall rocks in anchorage zone appears to be asymmetry in distribution.