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针对煤巷高冒区自燃发火位置隐蔽性较强的问题,利用数值方法从漏风风速的角度分析了高冒区自燃危险区域分布特征。通过对比发现:高冒区的拱形结构会减缓漏入风流速度,使自燃区域主要集中在背风区,施加挡板封闭后会大幅减少自燃区域范围,但挡板密闭不严时,反而会扩大易自燃区域范围,增加自燃几率。现场施工应严格保证挡板密闭性,并尽量延长封闭长度。
In order to solve the problem that the fire spontaneous combustion location in the coal seam alley is high, the distribution characteristics of spontaneous combustion danger area in high pouring area are analyzed by the numerical method from the angle of air leakage. The comparison shows that the arched structure of high riser area will slow down the speed of wind leakage, so that the spontaneous combustion area is mainly concentrated in the leeward area. After the baffle is closed, the spontaneous combustion area will be greatly reduced. However, when the baffle is not tightly closed, Easily spontaneous combustion range, increase the probability of spontaneous combustion. Site construction should be strictly guaranteed baffle closed, and try to extend the closure length.