Mining damage of mine boundary coal pillar in closed mine and its safety evaluatio
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摘要: 闭坑矿井矿界煤柱受采动损伤后其隔水能力降低，易导致闭坑老空水破坏矿界煤柱进入相邻生产矿井，影响矿井安全生产。以淮北矿区两相邻矿井即闭坑矿井沈庄矿和生产矿井袁庄矿的矿界煤柱为研究对象，采用FLAC3d数值模拟和理论计算方法，对沈庄矿S2Ⅱ313工作面和袁庄矿Ⅲ3142工作面矿界煤柱采动损伤区宽度进行研究，根据研究结果确定矿界煤柱采动损伤区宽度为13.1 m，表明矿界煤柱已被破坏，两相邻矿井边界煤岩层已不具备阻水能力。在此基础上对矿界煤柱安全性进行了评价，得出现有矿界煤柱存在渗水和溃水危险性，需采取布置阻水帷幕或注浆加固等措施。Abstract: Mining damage of mine boundary coal pillar in closed mine could weaken its water isolation ability, which easily lead goaf water in the closed mine to adjacent producing mine through damaging the mine boundary coal pillar and affect mine safe production. Taking mine boundary coal pillar between closed Shenzhuang Mine and producing Yuanzhuang Mine in Huaibei mining area as research objects, mining damage width of mine boundary coal pillar between S2Ⅱ313 working face in Shenzhuang Mine and Ⅲ3142 working face in Yuanzhuang Mine was researched by FLAC3d numerical simulation and theoretical calculation method. The mining damage width is determined 13.1 m according to the research results, which shows that the mine boundary coal pillar has been destroyed, and coal seam in boundary of the two adjacent mines has no water blocking capacity. On this basis, safety of the mine boundary coal pillar was evaluated. The conclusion is that there are risks of coal pillar water seeping and collapsing, and some measures should be taken out such as setting water-blocking curtain, grouting reinforcement and so on.
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期刊类型引用(8)
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