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“钻孔双端封堵测漏”是一种通过专用设备在煤层顶板钻孔中进行加压注水,根据钻孔壁岩体破坏前后注水漏失量的变化来确定导水裂隙带高度的实用裂高测试技术。通过刘庄煤矿121101工作面覆岩破坏裂高原位测试应用表明,该技术具有原理简单、成果直观等特点。
“Drilling double-ended plugging leak detection ” is a kind of practical cracking height test to determine the height of water-conducting fractured zone according to the change of water injection loss before and after the destruction of borehole wall rock by special equipment in the coal seam roof drilling. technology. Through the application of the in situ test of the overburden rock failure in the 121101 working face of Liuzhuang Coal Mine, it shows that this technology has the characteristics of simple principle and intuitive result.