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针对煤矿高动压区域掘进巷道过程中缺乏区域化卸压方法的现状,基于煤层注水压裂防冲机理,通过长钻孔控制性压裂工艺研究,提出了煤层超高压定点水力压裂防冲工艺。为检验该技术的可行性,在华丰煤矿进行了现场工业性试验,联合采用微震监测系统、应力动态实时监测系统与管路压力传感器,对试验过程中煤岩体微震破裂事件、煤岩体应力变化情况和管路压力进行了监测分析,证明了该技术能够大幅度降低冲击煤层的危险性。
Aiming at the lack of regionalized pressure relief method in tunneling of high dynamic pressure area in coal mine, based on the mechanism of water injection fracturing and anti-scouring in coal seam and the research of controlled fracturing technology in long borehole, Process. In order to test the feasibility of this technology, an on-site industrial test was carried out in Huafeng Coal Mine. Combined with microseismic monitoring system, stress dynamic real-time monitoring system and pipeline pressure sensor, microseismic rupture of coal and rock mass, Stress changes and pipeline pressure monitoring analysis showed that the technology can greatly reduce the risk of impact on the coal seam.