川藏铁路3000 m水平定向钻井技术方案  

Technical plan for 3000m long horizontal directional drillingfor Sichuan Tibet Railway

作　　者：张恒春[1] 刘广[1] 吴纪修[1] 王庆晓[1] 于好善[1] 刘志强[1] 许洁[1] ZHANG Hengchun;LIU Guang;WU Jixiu;WANG Qingxiao;YU Haoshan;LIU Zhiqiang;XU Jie(Institute of Exploration Techniques,CAGS,Langfang Hebei 065000,China)

机构地区：[1]中国地质科学院勘探技术研究所,河北廊坊065000

出　　处：《探矿工程（岩土钻掘工程）》2020年第11期1-6,共6页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：中国地质科学院勘探技术研究所科技资助项目“大直径孕镶金刚石取心钻头制备工艺研究”(编号:YB202003);中国地质调查局地质调查项目“冀中坳陷深部碳酸盐热储调查评价”(编号:DD20201103);“苏皖赣地区页岩油气战略选区调查”(编号:DD20201171)。

摘　　要：川藏铁路设计多条超长深埋隧道,且多处于高海拔、高陡斜坡及雪线以上的无人山区,地形险峻,起伏大,交通条件差。沿隧道轴线的水平定向钻井为隧道勘察提供了一种有效的勘察手段。结合工程及地层特点,从钻井设备、工艺等方面,为超长隧道勘察提供了一种3000 m级水平定向钻井技术方案。方案明确了井身结构、全面钻进和长钻程取心钻进工艺、钻井液措施及部分复杂情况应对措施。以较少的钻探工作量,为隧道勘察提供更加详细的实物地质资料,真实反映隧道内的地质情况。Many deep-buried super-long tunnels are designed for the Sichuan Tibet Railway line,and most of them are located in high altitude,high steep slope and no-man mountain zones above the snow line,where the terrain is steep and undulating,and the traffic conditions are poor.Horizontal directional drilling along the tunnel axis provides an effective method for tunnel investigation.In view of the engineering and geological characteristics,this paper provides a 3000m capacity horizontal directional drilling plan for super-long tunnel investigation in terms of equipment and technology.The hole profile is specified in the plan together with full-face drilling and coring drilling technology,drilling fluid measures and some measures for complex situations.With less amount of drill work,the plan provides more detailed physical geological data for tunnel investigation,hence the true characterization of the geological conditions in the tunnel.

关 键 词：隧道勘察 水平井 定向井 长钻程取心钻进 川藏铁路 

分 类 号：P634.7[天文地球—地质矿产勘探] U452.1[天文地球—地质学]