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巷道底板冲击是煤矿冲击矿压多种表现形式的一种,其显现强度与破坏程度愈发严重。论文理论分析了巷道底板的冲击诱发机理,并提出底板卸压防冲原理,即通过改变巷道底板的抗弯强度以降低巷道底板冲击诱发条件。同时采用FLAC3D数值模拟,分别对底煤巷道和硬底巷道采取的卸压槽、大直径钻孔等不同措施的解危效果进行比较分析,得出底煤巷道采取卸压槽和大直径卸压钻孔相结合的复合式卸压措施防冲效果较为理想,研究成查对于硬底巷道在巷道底板实施大直径钻孔和卸压爆破的组合式解危措施效果较理想。可为巷道底板冲击防治提供一定理论依据。
Roadway floor impact is one of the many forms of coal mine rock burst, the intensity and extent of its damage is more and more serious. The paper theoretically analyzed the mechanism of impact induced by roadway floor, and put forward the principles of relief and anti-flushing of floor, that is, by changing the bending strength of roadway floor to reduce the impact of roadway floor induced conditions. At the same time, FLAC3D numerical simulation is used to analyze the different methods of relief tunnels, such as pressure relief groove, large diameter borehole and so on. It is concluded that the pressure relief groove and the large diameter relief The combined pressure relief measures combined with drilling have better anti-flushing effect. The research results show that the combined anti-danger measures of hard bottom roadway with large diameter borehole and pressure relief blasting are more effective. It can provide certain theoretical basis for the prevention and control of roadway floor.