水平孔长距离取心技术在华北某矿水害治理效果验证中的应用

Application of long-distance coring technology in horizontal holes for water hazard control effect verification in a mine in North China

摘要:

为精准探查矿区水害治理效果，解决传统垂直钻探取心勘查验证方式存在的覆盖面积少、施工成本高、钻探周期长、地层数据少等不足，创新性采用水平定向孔长距离取心对前期治理工作面进行取心作业。经过对地层进行分析，并对比SR、川系列、QXT-RBX系列取心钻具，在4-18A、4-25检查孔施工中，采用SQ-MWD定向设备和?152.4 mm取心钻头+川6-3取心筒+?89 mm加重钻杆+?89 mm钻杆+?121 mm钻铤+顶驱的钻具组合实时控制钻进参数并进行取心，2个验证孔共取心10次，探查区域0.48 km²，在节省成本的同时有效提高了钻遇率，岩心采取率达80%以上，部分孔段岩心采取率100%，岩心完整，成柱性良好，有效反映出水害治理效果，为后续开发提供了更加准确的地质资料。

Abstract:

To accurately assess the effectiveness of water hazard control in mine area， addressing the limitations of traditional vertical coring methods-such as limited coverage， high costs， prolonged drilling cycles， and sparse formation data， an innovative approach was adopted. This involved using long-distance coring in horizontal directional holes to perform coring operations in previously treated working faces. After analyzing the formation conditions and comparing SR， Sichuan series， and QXT-RBX series coring tools， during the drilling of inspection holes 4-18A and 4-25， the SQ-MWD directional equipment paired with a drilling tool assembly of ?152.4 mm coring bit + Sichuan-6-3 coring barrel + ?89 mm heavy-weight drill pipe + ?89 mm drill pipe + ?121 mm drill collar + top drive setup were selected to real-time control drilling parameters and perform coring. A total of 10 coring operations were conducted in the two verification holes， covering an exploration area of 0.48 km2. This method not only reduced costs but also significantly improved the drilling success rate， achieving a coring recovery rate of over 80%， with some sections reaching 100%. The cores were intact with excellent columnar integrity， effectively reflecting the water hazard control results and providing more accurate geological data for subsequent development.