新景矿采煤工作面高位定向长钻孔瓦斯治理技术

High-level Directional Long Drilling Gas Control Technology For Coal Mining Face In Xinjing Colliery

为解决新景矿煤业有限责任公司15^(#)煤层15317工作面回风隅角瓦斯超限的问题,采用关键层控制理论和现场经验,确定了近水平高位定向长钻孔的最佳钻孔位置和技术参数,同时进行了工业性试验。现场实践结果表明:新设计的高位定向长钻孔抽采时工作面回风隅角瓦斯浓度由最高0.92%降至最低0.42%,有效解决了回风隅角瓦斯超限问题,保证了井下工作面的安全回采。

In order to solve the gas overrun in the upper corner at 15317 working face in No.15 coal seam of Xinjing Mine Coal Industry Co.,Ltd.,the author determines the best drilling position and technical parameters of sub-horizontal high-level directional long drilling by adopting the key strata control theory and field experience,whose industrial tests results show that the gas concentration in the upper corner of the working face has been reduced from the highest 0.92%to the lowest 0.42%during extraction,effectively solving the gas overrun in the upper corner and ensuring the safe recovery of the working face.