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深部软岩巷道的应力状态变化极其复杂,巷道开挖后很难找到二次应力状态的分布规律,高应力软岩巷道经常出现严重的底鼓、冒顶和片帮现象,为了找到巷道底板围岩应力的变化规律。通过应用FLAC~(3D)数值模拟软件分析梁家煤矿煤2巷道底板底鼓量的变化规律,在煤2巷道开挖并进行支护后,监测巷道底板下1、2、3、4 m的底鼓量,应用最小二乘法原理进行曲线拟合,通过现场矿压监测结果表明,在煤2巷道地质条件下,拟合出的曲线符合实际巷道底板底鼓量的变化。
The change of the stress state in the deep soft rock roadway is extremely complicated. It is hard to find the distribution law of the secondary stress state after the tunnel excavation. In the high stress soft rock roadway, the phenomenon of the bottom drum, Stress changes. Through the application of FLAC 3D numerical simulation software to analyze the variation law of the bottom drum volume of coal seam 2 in Liangji coal mine, after the excavation and support of coal roadway 2, the 1, 2, 3, 4 m According to the result of mine pressure monitoring, it shows that the curve fitting in the roadway of Coal 2 is in accordance with the change of the floor drum of the actual roadway floor.