张双楼煤矿坚硬顶板覆岩破坏电法监测研究

Study on electrical monitoring of hard roof overburden failure in Zhangshuanglou Coal Mine

基于钻孔电法勘探手段,根据张双楼煤矿9600工作面开采条件,采用在钻孔中安设监测电法系统的技术,对该矿提高上限开采坚硬顶板覆岩破坏进行了探测。结果表明,9600工作面采空区上方垮落带高度为13 m,导水裂缝带高度为46 m,不能发育到第四系底砾层,为提高上限开采提供了依据,保证了9600工作面的安全生产,对类似条件矿井具有一定的借鉴意义。

Based on the borehole electrical prospecting method and according to the mining conditions of 9600 working face in Zhangshuanglou Coal Mine,the technology of installing monitoring electrical prospecting system in the borehole was adopted to detect the failure of the hard roof slab overburden in the mining with the upper limit raised.The results show that the height of the caving zone above the goaf of 9600 working face is 13 m,and the height of the water-conducting fracture zone is 46 m,which can not develop to the quaternary bottom gravel layer.This provides a basis for raising the upper limit of mining,ensures the safe production of 9600 working face,and has a certain reference significance for mines with similar conditions.