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通过对阳煤集团二矿综放面的综合观测,得到采空区气体、温度的分布及其在工作面推进过程中的动态变化。根据观测数据及所采煤层自燃的极限参数和工作面的开采条件等,确定了采空区“三带”的范围,并结合阳煤集团二矿煤的自然发火期,确定了工作面不发生自燃的最小推进度,据此可以对综放面采空区自燃危险性进行预测。
By comprehensive observation of the fully mechanized top coal caving face of the No.2 Coal Mine of Yangquan Coal Mine, the distribution of gas and temperature in goaf and the dynamic changes during the advancing process of the working face are obtained. According to the observed data, the limit parameters of spontaneous combustion of coal seam and the mining conditions of working face, the scope of “three belts” of goaf is determined. Combined with the spontaneous firing period of coal in Yangmei Group No.2 coal mine, the working face Spontaneous combustion of the minimum propulsion, which can be based on the gob of spontaneous combustion danger prediction.