Research on Characteristics and Mechanism of Rockburst Occurring in High Geo-temperature and High Geo-stress Tunnel

被引：0
|
作者：
Yan J. [1 ,2 ]
He C. [1 ]
Wang B. [1 ]
Xu G. [1 ]
Wu F. [1 ]
Pan P. [3 ]
机构：
[1] MOE Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Chengdu
[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[3] China Railway Eryuan Engineering Group Co., Ltd., Chengdu
来源：
Wang, Bo (ahbowang@163.com) | 1600年 / Science Press卷 / 42期
关键词：
Characteristics of rockburst; High geo-temperature and high geo-stress tunnel; Mechanism of rockburst; Sichuan-Tibet Railway; Thermo-mechanical coupling effects;
D O I：
10.3969/j.issn.1001-8360.2020.12.024
中图分类号：
学科分类号：
摘要：
The Sangzhuling tunnel of Sichuan-Tibet Railway is a typical high geo-temperature and high geo-stress tunnel. The characteristics and mechanism of rockburst in Sangzhuling tunnel were summarized through statistical analysis of rockburst records, field test and numerical calculation. The rockburst incidents recorded in tunneling,the failure mode of rock surrounding,the spatial and temporal distribution characteristics, the initial high geo-stress and the secondary stress of surrounding rock,the high geo-temperature and the temperature drop on the wall were analyzed. The results show that the high geo-temperature and high geo-stress tunnel mainly features instantaneous rockbursts, characterized by the shear fault-type rockburst, the strain rockburst and the fault-slip rockburst in different buried depth sections. The shape and failure of rockburst at the vault, tunnel face and side wall show different characteristics. The thickness of cooling zone of surrounding rock is close to that of fractured rock slices. The coupling effect of excavation unloading and cooling aggravates the formation of plate cracking structural plane and accelerates the occurrence of rockbursts. The research results can help to accurately predict the occurrence of rock burst of similar high geo-temperature and high geo-stress tunnels, and provide the basis for formulating effective prevention and control measures. © 2020, Department of Journal of the China Railway Society. All right reserved.
引用
收藏
页码：186 / 194
页数：8
相关论文
共 24 条
  • [1] ZHENG Zongxi, SUN Qiqing, The Tunnel in Sichuan-Tibet Railway, Tunnel Construction, 37, 8, pp. 1049-1054, (2017)
  • [2] PETER P K, CAI M., Design of Rock Support System Under Rockburst Condition, International Journal of Rock Mechanics and Mining Sciences, 4, 3, pp. 215-227, (2012)
  • [3] ORTLEPP W D, STACEY T R., Rockburst Mechanisms in Tunnels and Shafts, Tunnelling and Underground Space Technology, 9, 1, pp. 59-65, (1994)
  • [4] FENG Xiating, XIAO Yaxun, FENG Guangliang, Et al., Study on the Development Process of Rockbursts, Chinese Journal of Rock Mechanics and Engineering, 38, 4, pp. 649-673, (2019)
  • [5] XU Linsheng, Research of Rockburst Formation Condition in Underground Engineering, Journal of Chongqing Jiaotong University, 24, 3, pp. 31-34, (2005)
  • [6] HE M C, XIA H M, JIA X N, Et al., Studies on Classification,Criteria and Control of Rockbursts, Journal of Rock Mechanics and Geotechnical Engineering, 4, 2, pp. 97-114, (2012)
  • [7] LI Tianbin, GAO Meiben, CHEN Guoqing, A Thermal Damage Constitutive Model for Hard Brittle Rocks and Its Preliminary Application, Chinese Journal of Geotechnical Mechanics and Engineering, 39, 8, pp. 1477-1484, (2017)
  • [8] MENG Wei, HE Chuan, ZHANG Junbo, Et al., Inverse Analyses of The Initial Geo-stress Field of Rock Masses Under High Geo-temperature and High Geo-stress, Chinese Journal of Rock Mechanics and Engineering, 39, 4, pp. 749-760, (2020)
  • [9] SU Guoshao, CHEN Zhiyong, YIN Hongxue, Et al., True Triaxial Tests on Rockburst of Granite After High Temperatures, Chinese Journal of Geotechnical Engineering, 38, 9, pp. 1586-1594, (2016)
  • [10] HU Yuefei, HU Yaoqing, ZHAO Guokai, Et al., Experimental Study on Mechanical Properties of Granite Subjected to Temperature and Stress Cycles, Chinese Journal of Rock Mechanics and Engineering, 39, 4, pp. 705-714, (2020)
123