高位抽放巷在大倾角井巷揭煤防突中的应用

Application of High Location Drainage Roadway in Coal Uncovering in Large Inclined Angle Mine

在揭煤前,利用高位瓦斯抽放巷向突出煤层打一定数量钻孔,再将钻孔与抽放管路相接,利用抽放泵提供的负压将煤层内的高压瓦斯抽出,在揭煤时使得初始释放瓦斯膨胀能降低,因而煤层失去突出危险性。对于近距离高瓦斯高突煤层,能大大缩短揭煤的工期。

Before coal uncovering, a certain number of drilling holes is drilled into the outburst coal seam with the high location drainage roadway. The drilling hdes and drainage pipes are connected together. The high-pressure gas in coal seam is pumped out by negative pressure privded with a drainage pump. The swelling in the initial release of gas is reduced in coal uncovering. The period of coal uncovering can be greatly shortened to the close and high gas outburst coal seam.