低热值矿井气作为城镇燃气的可行性探讨_燃气资讯_博燃网 关键词： 城镇燃气；矿井气；甲烷 [gap=158]Key words：town gas；mine drainage gas；methane
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The lowest volume fraction of methane in mine drainage gas used as town gas is discussed to fully utilize mine drainage gas.
探讨了作为城镇燃气的矿井气中甲烷的最低体积分数，以便于更充分地利用矿井气。
Directional drilling technique has already become a key link in long broach construction for gas drainage of the mine.
定向钻进技术已经成为煤矿井下抽放瓦斯长钻孔施工成套技术的关键环节。
Because gas drainage is strong in 3308 workface of Chengzhuang coal mine, stop production often takes place for above-the-common.
成庄煤矿3308综放面由于瓦斯排放量大，多次造成因瓦斯超限停产。
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