底板岩巷穿层钻孔预抽煤层瓦斯的技术应用
ZHENGMEI KEJI（2009）
Abstract
突出危险掘进工作面的瓦斯压力大,钻孔施工夹钻、顶钻严重,造成掘进效率低,严重制约了矿井的采掘接替,本文论述了在大平煤矿通过21中部水仓外环向21皮带下山掘进工作面提前施工底板岩石穿层钻孔,预抽煤巷条带煤层瓦斯,取得提高掘进工作面的掘进速度的良好效果.
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