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基于龙湖煤矿的水文地质条件,采用数值计算和相似模拟相结合的方法,研究了在不同煤厚和煤柱宽度时,防水煤岩柱的稳定性和失效形式,结果表明:采厚增加,导水裂隙的发育高度显著增大,裂采比增大;大煤柱不能明显降低导水裂隙的发育高度和煤柱塑性破坏宽度;防水失效主要有煤柱的塑性破坏和导水裂隙导通上部含水层两种形式;薄煤层防水煤岩柱留设应重点防止煤柱的塑性破坏,而厚煤层则应考虑导水裂隙的贯通情况.
Based on the hydrogeological conditions in Longhu Coal Mine, the stability and failure modes of waterproof coal pillar are studied under different coal thicknesses and coal pillar widths by the combination of numerical calculation and similar simulation. The results show that: The development height of water fissures significantly increased, and the ratio of fracturing to production increased. The large coal pillar did not reduce the development height of water-fissure and plastic collapse width of coal pillar obviously. The main failure of water-proof was the plastic failure of coal column and the upper part of water- Aquifer two forms; thin seam waterproofing coal pillar should be focused on preventing the plastic damage to the pillars, and thick seam should consider the water through the cracks.