高应力巷道底板卸压槽防治底臌的机理研究及实践

 摘要：随着煤矿开采深度的增加，高地应力巷道的底臌问题越来越突出，针对这种现状，根据“强弱强结构”原理深入分析了底板中部卸压槽支护技术机理，在巷道围岩高强度支护的基础上，采用了底板中部卸压槽支护技术解决高地应力巷道底臌问题。由于底板中部卸压槽施工工序复杂，施工困难，在巷道卸压支护中很少应用，为了解决施工问题，底板中部卸压槽采用了“二次爆破”技术，并优化技术施工方案，平行作业，保障了施工进度，成功解决了底板中部卸压槽的施工难题。现场工业试验表明，高应力巷道周围岩体的变形得到了有效地控制，采用卸压槽支护技术有效地解决了高应力巷道底臌问题, 维护了巷道的稳定性，保证了矿井的安全生产。

Research on the principle of the middle floor pressure-relieving groove to control the floor heave in high ground stress roadway and its application

AbstractAs the underground mining depth increased, the floor heave phenomenon of the high ground stress roadway is more and more serious. Based on the present situation, the theory of “strong soft strong structure” is used to analysis the support principle of the middle floor pressure-relieving groove. It uses the support method of the middle floor pressure-relieving groove to control the floor heave and do further research. Meanwhile, the surrounding rock of roadway must be supported in high strength. Because the construction of the middle floor pressure-relieving groove is complicate and difficult, it is rarely used. In order to overcome the construction problem, the technology of “blast two times” is adopted. The construction progress is not affected. It successfully solves the construction problem of the middle floor pressure-relieving groove through the optimizing the technological method and parallel work. The industrial application results show that deformation of the surrounding rock in high ground stress roadway has got effectively control. The pressure-relieving groove support technology can effectively control the floor heave in high ground stress roadway and keep the roadway stable. The mine safety in production has got guarantee.