有大量由于微差爆破所引起瓦斯突出的事实,但从未发生过瓦斯点燃和爆炸。利用瞬间取样器收集了微差爆破过程中工作面附近的气样并进行了化验。还试验了瓦斯在不同含氧量空气中的爆炸限。在分析和试验的基础上,提出了文章的主要观点,即微差爆破不仅可用于一般瓦斯煤层工作面,还可用于有瓦斯突出危险的工作面,因为在爆破过程中工作面附近缺氧的原故。 There is a large number of gas outbursts caused by the fact that the millisecond blasting has taken place, but gas has not ignited and exploded. An instantaneous sampler was used to collect gas samples near the working face during the micropolar blasting and tested. Also tested the gas explosion in the air with different oxygen content. On the basis of analysis and experiment, the article puts forward the main point of view, that is, the differential blasting can be used not only for the general gas coal seam working face but also for the working face with the gas outburst danger because the oxygen deficiency near the working face during blasting The reason.