Citation Search Quick Search
  2025, Vol. 44 Issue (3): 572-583    DOI: 10.3724/1000-6915.jrme.2024.0528
Artiles Current Issue | Archive | Adv Search |
Modeling and application of while drilling identification of sandification grade in sandy dolomite tunnels#br#
DONG Jiaxing1,YANG Ji1,ZHAO Yongchuan2,WANG Zhirong3,BAI Rui4,LI Jianguo2,MI Jian2,WANG Yixian5
(1. Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650500,China;
2. Yunnan Institute of Water and Hydropower Engineering Investigation,Design and Research,Kunming,Yunnan 650021,China;
3. Yuxi Branch Bureau,Yunnan Central Yunnan Water Diversion Construction Management Bureau,Yuxi,Yunnan 653100,China;
4. Central Yunnan Water Diversion Construction Administration Bureau,Kunming,Yunnan 650000,China;5. Yunnan Xiu Chuan Water and Hydropower Engineering Investigate Design Co.,Ltd.,Kunming,Yunnan 650021,China)
Download: PDF (3433 KB)   HTML (1 KB) 
Export: BibTeX | EndNote (RIS)      
Abstract  Accurate identification of sandification grades is crucial fordisaster prevention and control in sandy dolomite tunnels. However,the existing sandification grade classification methods cannot be effectively combined with advanced geological prediction,which weakens the role of advanced horizontal drilling results in disaster prevention and control to a certain extent. Based on the analysis of disaster cases,the rock breaking of bit numerical simulation under six typical working conditions was conducted by the ABAQUS. The drilling results of the corresponding rock strata were analyzed from two aspects of drilling displacement and real-time drilling speed,and the field drilling test was carried out. The frequency distribution characteristics of the drilling speed of the surrounding rock with different sandification grades were analyzed. Furthermore,a prediction model of sandification grade based on drilling speed was constructed and verified. The results show that:(1) The drilling speed of sandy dolomite increases with the increase of sandification grade,and it is reasonable and feasible to use drilling speed as a prediction index of dolomite sandification grade. (2) Based on the statistical analysis of 434 groups of actual advanced horizontal drilling speed,the likelihood of drilling speed in the range of 2.33–5 mm/s in weak sandy dolomite is 92.47%,the possibility of drilling speed in the range of 3.33–6.67 mm/s in severe sandy dolomite is 87.18%,and the possibility of drilling speed in the range of 4.17–9.17 mm/s in complete sandy dolomite is 90.74%,all of which show normal distribution. (3) The prediction model of sandification grade is applied to the Water Diversion Project in Central Yunnan,and the identification results are consistent with the actual sandification grade. The research results directly promote the application of advanced horizontal drilling results to the prediction and identification of sandification grade and guide the disaster prevention and control of sandy dolomite tunnels.
Key wordstunnel engineering      sandy dolomite      advanced drilling      drilling velocity      sandification grade prediction     
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
DONG Jiaxing1
YANG Ji1
ZHAO Yongchuan2
WANG Zhirong3
BAI Rui4
LI Jianguo2
MI Jian2
WANG Yixian5
Cite this article:   
DONG Jiaxing1,YANG Ji1,ZHAO Yongchuan2, et al. Modeling and application of while drilling identification of sandification grade in sandy dolomite tunnels#br#[J]. , 2025, 44(3): 572-583.
URL:  
https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2024.0528      OR      https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I3/572
Copyright © 2005-2015 Edited and Published by Editorial Office for Chinese Journal of Rock Mechanics and Engineering
Sponsored by : Chinese Society for Rock Mechanics and Engineering 
Published by : Science Press 
Address: Wuhan 430071, China  Tel: (027)87199250  Fax: (027)87199250  Email: rock@whrsm.ac.cn
DESIGNED BY: Beijing Magtech Science & Technolgy Development Co.,Ltd.
鄂公网安备 42010602003581号