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根据工作面覆岩基本顶悬伸结构,研究下工作面停采时与上工作面采空区间不同煤柱尺寸情况时,下工作面基本顶破断规律,分为大煤柱、中等煤柱、小煤柱3种情况,给出下工作面基本顶极限破断长度计算公式,并根据计算公式,给出最优煤柱尺寸,优化下工作面末采设计方案,解决工作面过空巷、通风、监测监控等问题,并成功实施。
According to the basic overhang structure of overlying strata in the working face, the basic roof breaking principle of the lower working face is studied when there are different sizes of coal pillars at the time when the working face is stopped mining and the upper working face goaf, which is divided into large pillar, medium pillar, The formula of the ultimate ultimate breaking length of the lower working face is given, and according to the calculation formula, the optimal size of the coal pillar is given to optimize the design plan of the end face of the working face, to solve the problem of overpass, , Monitoring and control and other issues, and the successful implementation.