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统计了阜新矿区单体工作面冒顶形态,地点和时间的一般情况。分析了冒顶基本原因,认为围岩应力变化造成顶板超前切割破坏,悬露后敌离滑落,顶板岩层强度被削弱,空顶距及推进速度大小等是直接影响顶板稳定性的因素,初撑力和支柱钻底对支撑能力和冒顶有本质影响。提出控制措施是根据临界空顶距确定支护方式和提高初撑力,并进行了分析。
Statistics of Fuxin mining area single roof fall form, location and time of the general situation. The basic reason of roof collapse is analyzed. It is considered that the change of surrounding rock stress leads to the cutting and destroying of the roof in advance, the falling and falling of the roof, the weakening of roof rock strata, the empty top and the speed of propulsion are the factors that directly affect the roof stability. And the bottom of the column to support the ability and roof have a fundamental impact. Proposed control measures are based on the critical empty roof to determine support and improve the initial support force, and conducted an analysis.