Experimental study on large diameter drilling in hard rock annular coring  

作　　者：Yinzhu WU Guochun YANG Wenchen WANG 

机构地区：[1]Changchun Institute of Technology, Changchun 130021, China [2]College of Construction Engineering, Jilin University, Changchun 130026, China

出　　处：《Global Geology》2008年第1期32-36,共5页世界地质（英文版）

摘　　要：Based on analyzing method of large diameter hard rock drilling at home and abroad, the authors proposed a set of drilling of large diameter hard rock annular coring in low energy consumption, low cost and high efficiency. The prototype of drilling tools was designed and was made. The experimental result of the prototype indicates that this plan and technology are feasible and reach the anticipated object of design. A set of drilling tools has been offered for the constructs of large diameter hard rock coring.Based on analyzing method of large diameter hard rock drilling at home and abroad, the authors proposed a set of drilling of large diameter hard rock annular coring in low energy consumption, low cost and high efficiency. The prototype of drilling tools was designed and was made. The experimental result of the prototype indicates that this plan and technology are feasible and reach the anticipated object of design. A set of drilling tools has been offered for the constructs of large diameter hard rock coring.

关 键 词：large diameter hard rock annular coring DRILLING 

分 类 号：P58[天文地球—岩石学]