【摘要】 针对白芦煤矿极近距离煤层条件下巷道围岩布置及控制难题，应用弹塑性理论和滑移线场理论计算开采引起的底板破坏深度，并采用数值模拟方法对白芦煤业不同采高、不同埋深、不同层间距、20 m煤柱和15 m煤柱条件下的4-1号煤开采留设煤柱对底板的破坏深度进行计算。结果表明：采高、埋深、上覆煤层煤柱尺寸是底板最大损伤深度的主要影响因素，层间距不是主要因素。通过对单侧采空和双侧采空时下部4-2号煤内垂直应力及集中系数分布研究，结果表明，4-1号煤埋深越大，垂直应力越大。煤柱宽度为15 m和20 m时，随着4-2号煤层煤柱宽度的增加，下部4-2号煤层煤柱中部应力逐渐减低。综合以上影响因素对白芦煤业4-2号煤层回采巷道布置方式的适用性分析，可以将巷道布置在4-1号煤层区段煤柱下方。更多还原

【Abstract】 Addressing the challenges of roadway surrounding rock layout and control under the conditions of ultra-close coal seams in Bailu Coal Mine, this study initially employed elastoplastic theory and slip-line field theory to calculate the floor failure depth caused by mining. Numerical simulations were subsequently conducted to estimate the floor failure depth under various mining heights, buried depths, interlayer spacing, and coal pillars(20 m and 15 m) in the mining of No.4-1 coal seam. The results showed that the mining height, buried depth, and coal pillar size of overlying seams are the primary factors of the maximum floor failure depth, while interlayer spacing is not the main impact factor. Further investigation into the vertical stress concentration coefficient distribution in the lower coal seam 4-2 under both unilateral and bilateral goaf revealed that the greater the buried depth of No.4-1 coal, the greater the vertical stress. When the coal pillar width is 15 m or 20 m, with the increase of the width of the coal pillar of the No.4-2coal seam, the stress in the middle of the coal pillar of the lower No. 4-2 coal seam decreases gradually. Based on the applicability analysis of the influencing factors of the roadway layout in the No.4-2 seam of Bailu Coal Industry, the roadway can be arranged beneath the coal pillars in the No.4-1 seam.更多还原