煤自然发火促成瓦斯爆炸作用的讨论

在煤自燃与瓦斯共存的矿井,煤自然发火具有隐蔽性、突发性,其全过程一直是促成瓦斯爆炸(以下简称"瓦爆")的重要原因之一。大多数煤自燃气体成分与CH4同一类,比空气轻,易与CH4及O2混合,自身会爆炸。在煤自燃全过程中,阴燃阶段产气量、产烟量最大,隐蔽难察觉,是促成瓦爆的危险阶段。在低瓦斯条件下,煤自燃产气量相对CH4涌出量有"浓度效应",是此条件下瓦爆事故的原因之一,也是瓦检仪读数不到CH4爆炸浓度却发生了瓦爆事故的原因之一。

Discussion on the Effect of Coal Spontaneous Combustion Causing Gas Explosion

In the mine of gas and coal spontaneous combustion coexistence,the whole process of coal spontaneous combustion with concealment and burstiness,has been one of the important reasons contributed to the gas explosion.Most coal spontaneous combustion gas compositions are the same class with CH4,lighter than air,and easily mixed with CH4 and O2,itself will explode.In the whole process of coal spontaneous combustion,the quantity of gas and smoke production in smoldering phase is the biggest and difficult to detect,which is the dangerous phase to cause gas explosion.Under the conditions of low gas,the quantity of gas production of coal spontaneous combustion has " concentration effect " relative to CH4 emission,which is one of the reasons of gas explosion accidents under this condition,and is also one of reasons of gas explosion accidents without CH4 explosion concentration detected by gas detector.