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我国煤矿的抽放瓦斯工作,大致是从1949年在抚顺煤田开始的。经过近30年的努力,抽放瓦斯工作有了较大的发展和提高。瓦斯抽放技术从透气性较好的本煤层预抽发展到邻近层卸压抽放;从一般的打钻预抽瓦斯发展到采用水力压裂、水力割缝措施来提高煤层瓦斯抽放效率;从井下巷道和井下钻孔抽放瓦斯发展到地面钻孔抽放瓦斯。就是说,抽放瓦斯的工艺技术水平在不断地发展和提高。抽放瓦斯效率也有所增加。
China’s coal mine drainage gas work, roughly from the Fushun Coalfield in 1949 began. After nearly 30 years of hard work, the gas drainage has been greatly developed and improved. Gas drainage technology advances from pre-pumping of well-ventilated coal seams to depressurization and drainage of adjacent layers. From general drilling pre-drainage gas to hydraulic fracking and hydraulic kerfing measures to improve gas drainage efficiency in coal seams, Gas drainage from underground tunnels and downhole boreholes to ground borehole drainage gas. That is to say, the technical level of gas drainage is continually developing and improving. Drainage gas efficiency has also increased.