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为克服煤矿井下现有深孔破岩技术不足,提出将静力破岩技术应运于煤矿井下深孔破岩工作中。基于理论分析静力破岩原理得出被破岩体发生拉伸破坏,提出实施深孔静力破岩的技术要求。在某矿K8113工作面进风巷落山方向实施深孔静力破岩技术以减小回采巷道采空区后方较大范围悬顶问题的工程试验,试验后悬顶距离比未处理时缩短10 m左右,减小约50%,表明深孔静力破岩技术对解决两巷落山顶板的悬顶问题可行有效。
In order to overcome the shortcomings of existing deep-hole rock breaking technology in underground coal mines, it is proposed that static rock breaking technology should be applied to deep-hole rock breaking in coal mines. Based on the theoretical analysis of the principle of static rock breaking, the tensile failure of the rock mass is concluded, and the technical requirements of implementing deep-hole static rock breaking are proposed. In a mine K8113 face downwind into the direction of the implementation of deep hole static rock breaking technology to reduce the back of the mining tunnel large area behind the roof of the project test, after the test suspended overhead distance shorter than 10 m when untreated, A decrease of about 50%, indicating that deep-hole static rock breaking technology is feasible and effective to solve the cantilevered roof problem of two alluvial roofs.