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为研究倾斜煤层底板破坏深度影响因素(采深、采高、工作面斜长、煤层倾角、以及顶、底板岩性组合)对底板采动破坏深度的敏感性。以阳城煤矿的采场条件为工程背景,基于FLAC3D数值模拟软件对1309工作面底板采动破坏深度进行正交模拟,并运用方差分析法对模拟结果进行分析研究。研究表明:各主控因素对底板破坏深度的敏感性主次顺序为:顶板岩性组合>工作面斜长>底板岩性组合>采深>采高>煤层倾角。其中,顶板岩性组合和工作面斜长高度显著,底板岩性组合、采深及采高显著,煤层倾角不显著。
In order to study the sensitivity to the depth of mining floor damage due to the influence factor of the destructive depth of bottom coal seam (mining depth, mining height, face slope of coal face, coal seam dip angle and the combination of roof and floor lithology). Taking the stope conditions of Yangcheng Coal Mine as the engineering background, the depth of mining failure of 1309 working face was simulated by using FLAC3D numerical simulation software, and the simulation results were analyzed by analysis of variance. The results show that the primary and secondary sensitivities of main controlling factors to the failure depth are as follows: roof lithology combination> face inclination> floor lithology combination> mining depth> mining height> coal seam inclination angle. Among them, the top plate lithology combination and face slanting length is significant, the bottom plate lithology combination, mining depth and mining height significantly, coal seam dip is not significant.