我国煤矿频繁发生的瓦斯、煤尘爆炸事故给人民的生命和财产安全带来了严重的威胁。
The frequent gas and coal dust explosion accidents in coal mine is a big threat to the life and property.
煤矿井下杂散电流是引起瓦斯、煤尘爆炸的一个重要起因，严重威胁到煤矿的安全生产。
Stray current in coal mine underground is an important factor caused gas and coal dust explosion, which seriously threatened safety production in mines.
对障碍物在瓦斯煤尘燃烧爆炸过程中的火焰传播规律进行了实验研究，结果表明：障碍物对火焰的传播速度具有重要的影响。
Experimental study was conducted on the propagation regularity of flame in the process of gas and coal-dust combustion and explosion in the existence of obstacle objects.
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