Application and reliability analysis of DPM system in site investigation of HK weathered granite

作     者：Zhuoying Tan Meifeng Cai Zhongqi Yue L.G. Tham C.F. Lee 

作者机构：State Key Laboratory of High-Efficient Mining and Safety of Metal Mines （University of Science and Technology Beijing） Ministry of Education Beijing 100083 China Department of Civil Engineering University of Hong Kong Pokfulam Road Hong Kong China 

出 版 物：《Journal of University of Science and Technology Beijing》 (北京科技大学学报（英文版）)

年 卷 期：2005年第12卷第6期

页      面：481-488页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：This work is financially supported by the Research Grant Council of HKSAR Government and Hong Kong Jockey Club CharitiesTrust 

主　　题：drilling process monitoring hydraulic rotary drill instrumented borehole drilling geotechnical engineering weathered granite 

摘      要：A drilling process monitor （DPM） for ground characterization of weathered granite is presented. The monitor is portable and can be mounted on a hydraulic rotary drilling rig to record various drilling parameters in real time during normal subsurface investigation. The identification method for dominative and subsidiary interfaces has been established. The study reveals that the monitored drilling parameters are dependent on geotechnical materials and can be further applied to characterize ground interfaces. The t-test between manual logging and DPM logging has been carried out. The results show that the DPM has high accuracy in interfaces detection and well agreement with the manual logging. The findings show that the device and data analysis method are of potential application in subsurface drilling exploration in weathered granites. It also seems to have prospective uses in the determination of orebody boundary as well as in the detection of geohazards.