【摘 要】
：
煤矿为了利用重力运出开采的煤,大多以向上倾角向前掘进.煤矿巷道中溢出的瓦斯气团比空气轻,在空气中受浮力会沿着上倾的巷道向顶部流动,集聚在巷道顶部的最高点(采煤面)附近
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煤矿为了利用重力运出开采的煤,大多以向上倾角向前掘进.煤矿巷道中溢出的瓦斯气团比空气轻,在空气中受浮力会沿着上倾的巷道向顶部流动,集聚在巷道顶部的最高点(采煤面)附近,形成体积分数为5%～15%的瓦斯气-空气可爆混合气.这是上倾巷道顶部的一种"自恶化作用",是煤矿瓦斯爆炸的主要原因.目前,煤矿采用的通风方式不能完全消除这种可爆混气的形成,本文给出消除煤矿瓦斯爆炸的措施.
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