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中文摘要：
针对煤层开采底板突水问题,确定底板采动破坏深度是评价底板突水的重要因素之一。根据某矿7501,7502工作面的采矿地质条件、煤层及顶底板岩层结构和力学性质,运用弹、塑性力学理论和数值模拟研究确定正常底板的采动破坏深度分别为10.28,12m;断层影响的底板采动破坏深度分别为19.73,22m。结果表明,断层影响的底板采动破坏深度约是正常底板的2倍。对比现场实测的底板破坏深度数据,证实所建立的力学解析式和数值计算模型是可行的。
英文摘要：
Determining the mining failure depth of floor is one of the important factors in evaluation of water inrush for coal mining.According to the 7501 and 7502working faces,the geological conditions,as well as the strata structures and mechanical parameters of coal seam,roof and floor were studied.Based on the theory of elastic-plastic mechanics and numerical simulation,the normal failure depths of floor were respectively 10.28 m and 12 m,and the failure depths of floor under fault were respectively 19.73 mand 22 m.The results indicated that the failure depth of floor under fault was about 2times of the normal floor.The measured data of destroyed floor depths proved the mechanical formula and numerical calculation models were feasible.
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