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通过在阳湾沟煤矿6202综放工作面采空区现场埋管观测,取得了采空区内进、回风侧不同测点距工作面不同距离处温度、O2、CO气体浓度等参数,分析得到了采空区内O2浓度及漏风强度的分布规律。依据“三带”划分方法对阳湾沟煤矿自燃危险区域进行了划分,确定了6202综放工作面采空区“三带”范围,并根据氧化升温带宽度及浮煤最短自然发火期确定了工作面极限推进速度。
The parameters of temperature, O2, CO concentration and other parameters at different distances from the working face at the inlet and the return air side of the gob area are obtained through on-site buried pipe observation in the gob of 6202 fully mechanized caving mining face in Yangwangou Coal Mine. The distribution of O2 concentration and air leakage intensity in goaf was obtained. Based on the “three zones” division method, the danger zone of spontaneous combustion in Yangwangou coal mine is divided and the range of “three zones” of 6202 fully mechanized top coal caving face is determined. According to the width of oxidation warming zone and the shortest naturally Fire period to determine the maximum advancing speed face.