煤矿瓦斯事故预防及控制措施施卫祖一、我国煤矿瓦斯危害的基本情况据初步统计，我国共有煤矿约８万个，其中国有煤矿３０００多个（国有重点煤矿７００多个，地方国有煤矿２３００多个），乡镇煤矿有７万多个，年产原煤１３亿多吨，国有煤矿与乡镇煤矿约各占一半。我国煤... According to preliminary statistics, there are about 80,000 coal mines in China, of which there are over 3,000 state-owned mines (over 700 state-owned key mines and over 2,300 state-owned coal mines) , Township coal mines have more than 70,000, with an annual output of more than 1.3 billion tons of coal, state-owned coal mines and township coal mines account for about half each. Our country coal ...