超前切顶卸压技术在沿空掘巷中的应用

Application of Advanced Roof Cutting and Pressure Relief Technology in Gob Side Entry Driving

为保证沿空掘巷巷道支护强度满足安全生产需要,避免因煤柱留设过大而造成资源浪费,在顺槽巷道走向沿工作面采用超前切顶卸压的方式进行超前爆破,巷道基本顶与采空区基本顶之间断出裂缝,使采空区加速稳定,以此减少顺槽顶板的矿压显现。

In order to ensure that the support strength of roadway along empty roadway meets the needs of safety production and avoid the waste of resources caused by too large coal pillar,the way of advanced cutting and pressure relief is adopted for advanced blasting along the working face along the strike of the gateway,and the crack is broken between the basic roof of the gateway and the basic roof of the goaf.The goaf is accelerated and stabilized,so as to reduce the ore pressure of the roof.