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为指导高河煤矿W1309高瓦斯超长综采工作面安全高效开采,工作面布置双尾巷回采巷道,有效降低瓦斯浓度,防止瓦斯积聚并采用UDEC、PFC~(2D)数值模拟的方法对超长综采工作面顶板破断特征以及不同放煤步距下顶煤的采出率进行了研究。
In order to guide the safe and efficient mining of W1309 high gassy and ultra-long fully mechanized coal mining face in Gaohe coal mine, the double-tail laneway mining roadway is arranged on the working face to effectively reduce the gas concentration and prevent gas accumulation. UDEC and PFC 2D numerical simulation methods are used to simulate the long- The roof breaking characteristics of fully mechanized coal mining face and the rate of coal mining under different coal caving steps were studied.