甘肃杨岭铁矿区复杂地层岩心钻探技术  

Core drilling technology for complex strata in Yangling iron mine area,Gansu Province

作　　者：李增梁 陈永平 穆元红 杨海云 刘海声 LI Zengiang;CHEN Yongping;MU Yuanhong;YANG Haiyun;LIU Haisheng(Qinghai Provincial Second Geological Exploration Institute,Xining Qinghai 810003,China;Qinghai Province Core Drilling Engineering Technology Research Center,Xining Qinghai 810003,China)

机构地区：[1]青海省第二地质勘查院,青海西宁810003 [2]青海省岩心钻探工程技术研究中心,青海西宁810003

出　　处：《钻探工程》2024年第S01期287-291,共5页Drilling Engineering

基　　金：中共青海省委人才工作领导小组2022年度青海省“昆仑英才·高端创新创业人才”计划项目(青人才字[2023]1号);青海省地质矿产勘查开发局2023年度局地质勘查项目(第一批)“青藏高原地质钻探绿色施工技术研究与应用示范”(青地矿科[2023]33号)。

摘　　要：甘肃杨岭铁矿区的铁矿体赋矿层位为蓟县系平头山组第四岩性段浅变质碎屑岩夹泥质大理岩岩层,地层上部完整、研磨性较强,下部破碎、漏失严重,且表现出较强的铁磁性。针对上述复杂地层导致的钻头寿命低、孔内事故频发、磁干扰严重等施工难题,通过采取优化钻孔结构、合理选择钻探设备、改进冲洗液使用工艺等措施,有效解决了上述问题,同时对加快施工进度、提高钻探效率、节约施工成本也起到了积极的促进作用。该钻探技术经验对其他强磁性矿区的钻孔施工具有一定的借鉴意义。The iron ore body in the Yangling Iron Mine area of Gansu Province is located in the fourth lithological segment of the Pingtoushan Formation of the Jixian system,which is composed of shallow metamorphic clastic rocks interbedded with muddy marble rock layers.The upper part of the strata is complete and has strong abrasiveness,while the lower part is severely fractured and leaked,exhibiting strong ferromagnetism.In response to the construction difficulties caused by the complex geological formations mentioned above,such as low drill bit lifespan,frequent accidents in the hole,and severe magnetic interference,measures such as optimizing drilling structure,selecting drilling equipment reasonably,and improving the use of flushing fluid have been taken to effectively solve the above problems.At the same time,it has played a positive role in accelerating construction progress,improving drilling efficiency,and saving construction costs.This drilling technology experience has certain reference significance for drilling construction in other strong magnetic mining areas.

关 键 词：强研磨地层 强磁性矿区 钻孔漏失 钻孔弯曲度 

分 类 号：P634.5[天文地球—地质矿产勘探]