Methane is inflammable and explosion hazard gas as the basis of mash gas, firedamp and rock gas.
甲烷作为瓦斯、天然气、沼气等的主要成分，是易燃易爆气体。
The actual processes of firedamp explosion in coal mines involve a catastrophic processes occurring in air conditions of underground coal mines.
煤矿发生瓦斯爆炸的过程实质是井下气体状态发生突变的过程。
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