The actual processes of firedampexplosion 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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Firedamp flame propagation rules under obstacles are researched during the gas explosion process. The results show that obstacles have an important affection to the gas flame propagation speed.