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为了研究煤层倾角对综采工作面底板卸压规律影响,通过力学理论分析得出随着煤层工作面倾角的增大,其底板泄压深度呈减少趋势;运用FlAC3D数值模拟软件模拟了0°、15°、30°、45°时的工作面底板应力分布特征,以卸压系数达35%为界,得出了不同底板卸压深度,并根据不同倾角工作面底板煤岩体垂直应力及位移分布曲线,分析了底板应力释放与变形规律。以瓦斯突出煤层矿井为实际工程背景,验证了理论及数值模拟分析的正确性。
In order to study the effect of coal seam dip on the pressure relief law of the fully mechanized coal mining face, through the mechanics theory analysis, it is found that the pressure relief depth of the coal seam floor decreases with the increase of dip of coal seam working face. By using FlAC3D numerical simulation software, 15 °, 30 °, 45 ° when the working face floor stress distribution characteristics of the pressure relief coefficient of 35% as the boundary, obtained the pressure relief depth of the different floor, and according to different incline face coal and rock vertical stress and displacement Distribution curve, analysis of the floor stress release and deformation law. Taking the coal seam with gas outburst as the actual engineering background, the correctness of the theoretical and numerical simulation is verified.