33throughgoaf[J].SafetyinCoalMines,2023,54(8):33-38.移动扫码阅读LIUXiugang,ZHANGQiang,CUIWanhao.KeydrillingtechnologyofLtypegasextractionhorizontalwell(8):33-38.刘修刚,张强,崔万豪.穿越采空区L型瓦斯抽采水平井钻进关键技术[J].煤矿安全,2023,54SafetyinCoalMinesAug.20232023年8月煤药发全No.8Vol.54第8期第54卷D01:10.13347/j.cnki.mkaq.2023.08.007穿越采空区L型瓦斯抽采水平井钻进关键技术刘修刚1.2.3,张强3,崔万豪3(1.中国矿业大学(北京),北京100083;2.煤炭科学研究总院,北京100013;3.中煤科工西安研究院(集团)有限公司,陕西西安710077)摘要:为了深部煤层开采之前能够高效超前抽采瓦斯,保障深部煤层安全开采,L型水平井钻进技术成为地面瓦斯抽采的主要方法之一。针对穿越采空区L型瓦斯抽采水平井钻进施工存在的诸多困难,主要从井身结构设计、穿越采空区氮气钻进技术、水平段钻进轨迹控制技术3个方面,进行了穿越采空区L型瓦斯抽采水平井钻进关键技术研究。将关键技术研究成果成功应用于了M矿区1口穿越采空区L型地面瓦斯抽采井,高效顺利完钻了该井施工,使得目标深部煤层水平段钻进的钻遇率约为90%。关键词:地面深煤层瓦斯抽采;L型瓦斯抽采水平井;穿越采空区钻进;氮气钻进;岩层扰动带中图分类号:TD41文献标志码:B文章编号:1003-496X(2023)08-0033-06KeydrillingtechnologyofLtypegasextractionhorizontalwellthroughgoafLIUXiugangl-2.3,ZHANGQiang,CUIWanhao3(1.ChinaUniversityofMiningandTechnology(Beijing),Beijing100083,China;2.ChinaCoalResearchInstitute,Beijing100013,China;3.ChinaCoalTechnologyandEngineeringGroupXi'anResearchInstitute(Group)Co.,Ltd.,Xi'an710077,China)Abstract:Inordertoefficientlyextractgasinadvancebeforethedeepcoalseamminingandensurethesafeminingofthedeepcoalseam,theL-shapedhorizontalwelldrillingtechnologyisoneofthemainmethodsofsurfacegasdrainage.TherearemanydifficultiesindrillinghorizontalwellforL-shapedgasdrainagethroughgoaf,whichisoneoftheimportantresearchtopicsofcoalandgasco-miningincoalminingarea.Mainlyfromthethreeaspectsofwellstructuredesign,nitrogendrillingtechnologythroughgoaf,anddrillingtrajectorycontroltechnologyinhorizontalsection,thekeytechnologyresearchofL-shapedgasdrainagehorizontalwelldrillingt...