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针对埋深和断面对巷道围岩破坏这一煤矿安全的关键问题,通过对掘进巷道围岩的理论建模,分析了不同埋深梯形掘进巷道的围岩应力场和位移的变化规律,结果表明:随着埋深增加,无锚杆支护的巷道两侧会受到很大的应力而发生变形直至破坏,而锚杆支护后,可以明显降低围岩周围的应力,且巷道位移较小,不产生破坏。煤矿巷道开挖后,应立即进行锚杆支护,可以十分有效的控制巷道两侧围岩以及顶板和底板的变形,从而使巷道处于安全状态。
Aiming at the key issues of the coal mine safety, such as the buried depth and cross section of surrounding rock destruction, the changing law of stress field and displacement of surrounding rock of tunnel with different depth is analyzed through the theoretical modeling of surrounding rock of tunneling roadway. The results show that : As the depth increases, both sides of the roadway without bolt support will be subject to great stress and deformation until the damage, and bolt support, can significantly reduce the stress around the surrounding rock, and the displacement of the roadway is small, Do not produce damage. Coal mine tunnel excavation, should be carried out immediately bolt support, can be very effective control of the surrounding rock on both sides of the roadway and roof and floor deformation, so that the roadway in a safe state.