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为全面了解“三软”煤层开采后围岩应力分布规律,运用FLAC3D数值模拟软件,以某矿超长“三软”炮采工作面的实际工程地质情况为依据,分析了工作面回采时走向和倾向的应力分布特征。数值模拟结果表明:沿工作面走向的前后支承压力的分布情况基本一致,其影响范围基本相同;而侧向支承压力的最大值为该矿区原岩应力的1.2~1.8倍。
In order to fully understand the stress distribution law of surrounding rock after “three soft” coal seam mining, using FLAC3D numerical simulation software, based on the actual engineering geology of the long soft “three soft ” mining face in a mine, Characteristics of stress distribution in the direction and tendency of face mining. The numerical simulation results show that the distribution of abutment pressure along the working face is basically the same, and the influence range is basically the same. The maximum lateral supporting pressure is 1.2 ~ 1.8 times of the original rock stress of the mining area.