伊犁矿区弱胶结覆岩导水裂缝带发育高度探测

Detection on Height Development Law of Water-conducting Fractured Zone of Weak Cementation Overlying Rock in Yili Coalfi eld

以伊犁四矿23223工作面为研究对象,分别采用地面瞬变电磁法的导高探测、井下钻孔并行电法的导水裂缝带高度探测,以及数值模拟等方法对煤层开采上覆岩层导水裂缝带发育高度及规律进行了现场探查与研究。结果表明:弱胶结覆岩条件下,工作面垮采比为3.0,裂采比为5.3。研究结果能进一步为弱胶结覆岩下采动安全开采提供科学借鉴。

Taking 23223 working face of No.4 Yili Coal as the research object,the height and development pattern of the water conducting fractured zone in the overlying strata of coal seam mining were investigated and studied,using methods such as ground surface transient electromagnetic method combined detection,underground drilling parallel electrical method detection of water conducting fracture zone height,and numerical simulation.The results show that under weakly cemented overlying rock conditions,the collapse mining ratio of the working face is 3.0 and the fracture mining ratio is 5.3.The research results can further provide scientific reference for safe mining under weakly cemented overlying rocks.