煤层气(coalbed methane)也称煤层甲烷,是一种非常规天然气。几十年来,煤层气的存在对煤矿安全生产带来了极大隐患。先后发生过多起瓦斯爆炸事故。造成人员伤亡和巨大的经济损失。煤矿企业一直视其为大害。近年来,随着科学技术的发展,一些煤矿已开始利用煤层气,提前通过地面钻孔抽汲赋存在煤层中气 Coalbed methane, also known as coal seam methane, is an unconventional natural gas. For several decades, the existence of CBM has brought great hidden danger to coal mine safety production. There have been many gas explosion accidents. Causing casualties and huge economic losses. Coal mining companies have always regarded it as a major hazard. In recent years, with the development of science and technology, some coal mines have begun to use CBM to pump gas in advance through ground drilling