摘要
我国很多煤矿区域瓦斯治理措施以高位巷穿层钻孔抽采为主,但是在实际抽采过程中发现瓦斯抽采浓度很低,瓦斯预抽效果不佳,主要是因为高位巷施工下行穿层抽采钻孔时,受到岩渣、煤渣、积水重力作用的影响,造成钻孔内的积水、积渣难以排出,进而影响封孔质量、降低瓦斯抽采效果。为了彻底解决下行抽采钻孔内积水、积渣问题,运用气举反循环原理,研制了新型浅入式排水器。在实践过程中,该装置能与钻孔工序有机结合,使用方便且排渣快速高效,并形成了一整套下行抽采钻孔排渣排水工艺体系。该研究成果能显著提高下行抽采钻孔瓦斯抽采浓度,确保瓦斯治理效果。
In many coal mine areas in my country,the gas control measures are mainly based on drilling through high-level roadways.However,in the actual mining process,it is found that the gas drainage concentration is very low,and the gas pre-draining effect is not good.The main reason is that when the high-level roadway is constructed,it is affected by the gravity of rock slag,coal slag and accumulated water,which makes it difficult to discharge the accumulated water and slag in the borehole,which in turn affects the sealing quality and reduces the gas drainage.In order to completely solve the problem of water accumulation and slag accumulation in the down-draining drilling holes,a new type of shallow-entry drain was developed by using the principle of gas lift reverse circulation.In practice,the device could be organically combined with the drilling process,which was easy to use,and had fast and efficient slag discharge.The research results could significantly improve the gas drainage concentration of down-draining drilling holes and ensured the effect of gas control.
作者
王锋伟
Wang Fengwei(The First Mine of Pingdingshan Tian′an Coal Industry Co.,Ltd.,Pingdingshan 467000,China)
出处
《能源与环保》
2022年第1期117-124,共8页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
下行钻孔排水
气举反循环原理
潜入式排水器
单向导通阀
正压排除积水
downward drilling drainage
gas lift reverse circulation principle
submersible drain
one-way valve
positive pressure to remove accumulated water
