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针对近距离煤层遗留煤柱下伏回采巷道围岩变形大、不易控制等难题,以某矿地层条件为研究背景,建立力学模型,研究了上覆煤层开采后遗留煤柱下伏煤岩层中水平和竖直方向的应力集中系数,研究了煤岩体受遗留煤柱影响后的围岩强度系数分布规律,揭示了遗留煤柱对下伏近距煤层围岩稳定性的影响。
Aiming at the problems such as large deformation and difficult control of the surrounding rock in the mining roadway of the coal pillar left behind in the short distance coal seam, a mechanical model is established based on the strata condition of a certain mine, and the level of coal in the underlying coal pillar after the overlying coal seam mining is studied And the stress concentration factor in the vertical direction, the law of distribution of surrounding rock strength coefficient of coal and rock mass influenced by the left coal pillar is studied, and the influence of the left coal pillar on the stability of the surrounding rock of the next close coal seam is revealed.