摘要
岩芯钻探是最直接有效的地质勘探方法之一,可直接揭露隧道掌子面前方地质体及其性质。为提高花岗岩地层中岩芯钻探钻进速度,根据钻头内外径的特殊参数要求,设计了5种新型取芯钻头,并仿真分析了花岗岩地层中不同钻头的切削受力情况、排渣性能,通过试验测试了不同钻头的钻进速度、岩心完整情况、钻头磨损情况。结果表明:PDC钻头钻进速度最快,但岩心破碎,应力较大,排渣性能较差;表镶金刚石钻头排渣性能较好,岩心完整,但应力较大,钻进速度较慢;孕镶金刚石钻头钻进速度较快,岩心完整,应力较小,排渣性能较好,更适合在花岗岩地层钻进,其中,深尖齿孕镶金刚石钻头磨损程度较小,为较优钻头。
Core drilling is one of the most direct and effective geological exploration methods,which can directly reveal the geological body and its properties in front of the tunnel face.In order to improve the drilling efficiency of the coring bit in granite formation,according to inside and outside diameter requirement of the bit,five new coring bits are designed in this work.The cutting force and slag removal performance of different bits in granite formation are simulated and analyzed,and the drilling efficiency and core integrity of different coring bits are tested.The results show that the PDC bit has the highest drlling speed,but the core is broken,the cuting force is large,and the slag removal performance is poor.The surface set diamond bit has good slag removal performance and complete core,but the cutting force is large and the drilling efficiency is slow.The impregnated diamond bits have the high drilling speed,complete core,less stress,better slag removal performance,which are more suitable for drilling in granite formation.Furthermore,the deep sharp tooth diamond-impregnated bit has less wear and is the best bit.
作者
姬海东
刘郡
陈力
JI Haidong;LIU Jun;CHEN Li(China Railway Construction Heavy Industry Corporation Limited,Changsha 410100,China)
出处
《机械设计与研究》
CSCD
北大核心
2024年第3期189-193,共5页
Machine Design And Research
基金
中国铁建股份有限公司2019年度科研计划项目(2019-B14)。
关键词
地质勘探
取芯钻头
钻进速度
花岗岩
排渣性能
应力分析
geological exploration
coring bit
drilling efficiency
granite formation
slag removal performance
stress analysis
