钻探工程2026，Vol.53Issue(3)：122-129,8.DOI:10.12143/j.ztgc.2026.03.015
小直径分支孔技术在贵州省富矿精开中的应用探索
Exploration of the application of smal1-diameter branch hole technology in the fine mining of rich ores in Guizhou Province
摘要
Abstract
In accordance with the work arrangements for the fine mining of rich minerals and the new round of strategic mineral exploration in Guizhou Province,in order to thoroughly implement the concept of green exploration and at the same time solve the problem that construction is prohibited in the first-level water source protection area,the drilling scheme of"1 straight hole+1 branch"is adopted for drilling.Based on the target area information,formation conditions of the main hole,screw skewing theory and equipment,the lateral drilling branch and coring process were determined.The lateral drilling branch was successfully drilled at a vertical depth of 426 m in the autonomous hole and hit the target with a target accuracy of 8.01 m.Through this directional drilling practice,the incline capacity for different drill bits and screw drills with different specifications of curved outer tubes was explored,and the incline strength control parameters suitable for rope coring drilling were found,providing technical support for the matching of similar green exploration and precision exploration technologies.关键词
绿色勘探/小直径分支孔/螺杆马达/富矿精开/水源保护地Key words
green exploration/small diameter branch hole/screw motor/fine mining of rich minerals/water source protection area分类
天文与地球科学引用本文复制引用
冉飞,田鹏辉,宋继伟,方青,詹恕明..小直径分支孔技术在贵州省富矿精开中的应用探索[J].钻探工程,2026,53(3):122-129,8.基金项目
贵州省科技计划项目"贵州省复杂地形和地质条件下深部取心钻探关键装备材料研究"(编号:黔科合支撑[2025]一般065号)、"贵州省岩溶地区复杂地层岩心钻探关键技术难题综合研究"(编号:黔科合支撑[2023]一般173号) （编号:黔科合支撑[2025]一般065号）
贵州省地矿局科研项目"传统岩心钻机转型施工近水平孔特种钻探结构改造及工艺研究"(编号:黔地矿科合[2023]9号) （编号:黔地矿科合[2023]9号）
安顺市科研项目"近平衡钻进技术在贵州省固体矿产钻探中的应用研究和实践"(编号:安市科工[2025]6号) （编号:安市科工[2025]6号）
