There are usually accidents in coal mines, which are mainly gas explosion and dust explosion.
煤矿开采比较容易出事故，煤矿事故又主要是瓦斯爆炸和煤尘爆炸。
The explosion characteristics of coal dust-methane mixture were studied.
实验研究了煤尘-甲烷混合物的爆炸特性。
The explosion characteristics of pure coal dust were studied.
实验研究了纯煤尘的爆炸特性。
It improves dust effect and working environment. It provides assure for explosion proof coal dust.
极大地改善工作面的灭尘效果，改善劳动环境，为防。
It improves dust effect and working environment. It provides assure for explosion proof coal dust.
极大地改善工作面的灭尘效果，改善劳动环境，为防。
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