千米钻孔打钻防喷孔装置在双柳煤矿瓦斯抽采中的应用

在突出矿井施工钻孔经常会遇到瓦斯喷孔现象，瓦斯喷孔是突出矿井钻孔施工过程中经常发生的一种瓦斯事故，钻孔施工过程中的喷孔现象不仅仅会造成瓦斯超限，而且会对钻孔施工人员生命安全造成严重威胁，危害矿井安全生产。为减小对突出矿井钻孔喷孔的危害，设计了一种防喷孔装置，该装置主要构成部分包括封孔套管、孔口多通装置、煤气分离装置、防喷抽采管、三通排渣装置等。使用这套装置后，打钻过程中排放的水、气、渣得到有效分离。在双柳煤矿千米钻机采用该防喷孔装置后，由喷孔引发的瓦斯超限事故基本没有再发生，保障了双柳煤矿的安全生产。

Application of drilling hole drilling and anti-jet hole device of kilometer deep borehole in gas drainage of Shuangliu Coal Mine

Gas injection holes are frequently encountered in the construction of wellbores.The gas injection hole is a kind of gas accident that often occurs in the drilling process of the mine.The injection hole phenomenon in the drilling process not only causes gas overrun，but also can pose a serious threat to the life safety of the drilling workers and endanger the safety of mines.In order to reduce the damage to the well-bore hole of the mine，a mine-jet-proofing device was designed.The main components of the device include a plugged casing，a multi-pass device，a gas separator，a blowout preventer，three-way slag discharge device.Through this set of equipment，the drainage of water，gas and slag during drilling process can be effectively separated.After the anti-spouting hole device was installed at the Shuangliu Coal Mine drilling rig，the gas overrun accident caused by the nozzle hole basically did not happen any more，which ensured the safe production of Shuangliu Coal Mine.