保护层开采定向长钻孔瓦斯抽采关键技术  

Key Technology of Directional Long Borehole Gas Drainage in Protective Layer Mining

作　　者：冯丽[1] 董春辉[2] FENG Li;DONG Chunhui(Department of Mechanical and Electronic Engineering,Changzhi Vocational and Technical College,Changzhi 046000,China;College of Mechanical Engineering,Anhui University of Technology,Ma'anshan 243002,China)

机构地区：[1]长治职业技术学院机械电子工程系,山西长治046000 [2]安徽工业大学机械工程学院,安徽马鞍山243002

出　　处：《煤炭技术》2022年第12期160-163,共4页Coal Technology

摘　　要：保护层开采是目前针对高瓦斯煤层群有效的瓦斯治理手段,确定保护层开采的卸压效果,确定定向长钻孔的合理抽采层位,有效的施工手段即是瓦斯抽采的关键技术。通过FLAC3D数值模拟分析了上覆岩层的应力、裂隙演化规律,对保护层开采后的卸压效果进行研究。此外,针对钻孔过程中所遇到的难题,针对实际情况介绍了定向钻机在钻孔过程中施工的关键技术,以期为类似工程提供借鉴。At present, protective layer mining is an effective gas control method for high gas coal seam group. To determine the pressure relief effect of protective layer mining and determine the reasonable drainage horizon of directional long drilling, effective construction method is the key technology of gas drainage. The stress and fracture evolution law of the overlying strata are analyzed by FLAC3Dnumerical simulation, and the pressure relief effect of the protective layer after mining is studied. In addition,aiming at the problems encountered in the drilling process and the actual situation, introduces the key technology of directional drilling rig in the drilling process, in order to provide reference for similar projects.

关 键 词：定向钻孔 裂隙演化 合理层位 保护层 

分 类 号：TD712.6[矿业工程—矿井通风与安全]