Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel

被引：0
作者：
Yaozhong Cui
Bo Wu
Guowang Meng
Shixiang Xu
机构：
[1] Guangxi University,College of Civil Engineering and Architecture
[2] East China University of Technology,School of Civil and Architectural Engineering
来源：
Scientific Reports | / 13卷
关键词：
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the process of cyclic blasting during tunnel excavation, the reserved surrounding rock sustains irreparable damage accumulation. For safe tunnel construction, it is imperative to understand the characteristics of blasting dynamic cumulative rock damage. Sonic wave test and numerical simulation methods were applied to the research. The JH-2 model was adopted as the damage model of surrounding rock. Based on the data transfer method between solvers in ABAQUS software, the cumulative damage was calculated. The damage characteristics were obtained by combining the sonic wave test results. According to the research findings, the entire reserved surrounding rock has periodic damage characteristics. Each periodic damage area has a funnel shape along the tunnel’s longitudinal direction, with a length of 160 cm, and 1.07 times the excavation footage. The latter excavation footage's blasting effect on the damaged area of the previous footage rock is 40 cm long, with three cumulative damage patterns. The three cumulative damage patterns more clearly reveal the surrounding rock's additional damage law, the degree of additional damage is greatest with the distance of 5–20 cm from the latter excavation footage. The research can provide appropriate theoretical guidance for the design of the step-blasting construction tunnel's blasting scheme and lining.
引用
收藏
相关论文
共 56 条
  • [1] Grady DE(1986)Continuum model of explosive fracture in oil shale Int. J. Rock. Mech. Min. 17 147-157
  • [2] Kipp ME(1986)Microcrack-Induced damage accumulation in brittle rock under dynamic loading Comput. Meth. Appl. Mech. Eng. 145 103374-3048
  • [3] Taylor LM(1987)A tensile damage model for rocks: application to blast induced damage assessment Comput. Geotech. 35 3041-93
  • [4] Chen E(2010)Rock damage control in bedrock blasting excavation for a nuclear power plant Int. J. Rock Mech. Min. Sci. 29 88-231
  • [5] Kuszmaul JS(1995)A new constitutive model for blast damage Int. J. Rock. Mech. Min. 09 1250056-1646
  • [6] Hamdi E(1997)Development of a continuum damage model for blasting analysis Int. J. Rock Mech. Min. Sci. 8 1675-2047
  • [7] Romdhane NB(2018)Laboratory study on the dynamic response of rock under blast loading with active confining pressure Int. J. Rock Mech. Min. Sci. 25 211-71
  • [8] Le Cleach JM(2017)Rock-like brittle material fragmentation under coupled static stress and spherical charge explosion Eng. Geol. 94 1639-undefined
  • [9] Li H(2017)Analysis of damage mechanisms and optimization of cut blasting design under high in-situ stresses Tunn. Undergr. Sp. Tech. 40 2038-undefined
  • [10] Yang R(2017)Effects of in-situ stresses on the fracturing of rock by blasting Comput. Geotech. 41 67-undefined
123456