Blasting Damage of Large Section Tunnel to Surrounding Rock in Near Area

被引：0
|
作者：
Wang M. [1 ]
Liu D. [1 ]
Lu X. [1 ]
Hou X. [1 ]
机构：
[1] School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing
来源：
Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | 2024年 / 44卷 / 06期
关键词：
acoustic testing; blasting damage; large cross-section tunnel; numerical simulation;
D O I：
10.15918/j.tbit1001-0645.2023.168
中图分类号：
学科分类号：
摘要：
Due to lack for the rock damage characteristics of tunnel blast surroundings under blasting loads, the rock damage effect of tunnel surroundings and the influence of different position of detonator hole with millisecond delay blasting on surrounding rock damage were studied based on acoustic testing and numerical simulation methods. And the Zhaitang Tunnel was took as the engineering background to validate the methods. The results show that the damage range of tunnel surrounding rock is about 2.4 m, and the cumulative damage of tunnel surrounding rock consists of two parts: explosion impact damage and explosion vibration damage. According to the distribution characteristics of damage, the rock mass preserved in the tunnel can be divided into four different sorts, namely, severely damaged area, strongly disturbed area, weakly disturbed area, and undisturbed area. Among them, the severely damaged and strongly disturbed areas are mainly affected by the collapse hole VI and its surrounding holes. The "banded damage" in the weak disturbance zone is the result of the comprehensive action of the detonator holes in each segment. © 2024 Beijing Institute of Technology. All rights reserved.
引用
收藏
页码：597 / 605
页数：8
相关论文
共 19 条
  • [1] YANG Yongbo, LIU Minggui, ZHANG Guohua, Et al., Analysis of construction parameter optimization for new large cross-section tunnel next to existing tunnels, Rock and Soil Mechanics, 31, 4, pp. 1217-1226, (2010)
  • [2] ZHAO Xiao, GAO Zhihua, LI Peng, Et al., Characteristics of dynamic response of surrounding rock induced by blasting excavation in underground cavern of HD project, Blasting, 31, 1, pp. 55-59, (2014)
  • [3] FLEETWOOD K G., Near-field blast vibration monitoring and analysis for prediction of blast damage in sublevel open stoping, (2010)
  • [4] RAINA A K, CHAKRABORTY A K, RAMULU M, Et al., Rock mass damage from underground blasting, a literature review, and lab and full scale tests to estimate crack depth by ultrasonic method[J], Fragblast, 4, 2, pp. 103-125, (2000)
  • [5] SCHULZE O, POPP T, KERN H, Et al., Development of damage and permeability in deforming rock salt[J], Engineering Geology, 61, 2, pp. 163-180, (2001)
  • [6] DOUCET C, CAMERON A, LIZOTTE Y., The effects of rock mass characteristics on fragmentation in controlled blasting experiments in small development heading[C], Proceedings of ISEE’s 22nd Annual Conference, pp. 1-11, (1996)
  • [7] RAMULU M, CHAKRABORTY A K, SITHARAM T G., Damage assessment of basaltic rock mass due to repeated blasting in a railway tunneling project-a case study, Tunneling and Underground Space Technology, 24, 2, pp. 208-221, (2009)
  • [8] CAO Feng, LING Tonghua, LI Jie, Et al., Cumulative damage feature analysis for shared rock in a neighborhood tunnel under cyclic explosion loading, Journal of Vibration and Shock, 37, 23, pp. 141-148, (2018)
  • [9] XU Zhong, DENG Hui, LU Ping, Et al., Study on cumulative blasting damage effect on surrounding rock of tunnel excavated with drilling-blasting method, Water Resources and Hydropower Engineering, 49, 2, pp. 70-76, (2018)
  • [10] YAN Changbin, Study on cumulative damage effects and stability of rock mass under blasting loading, (2006)
12