文献类型：期刊文献

英文题名：A new rockburst criterion of stress-strength ratio considering stress distribution of surrounding rock

作者：Liu, Xiqi[1];Wang, Gang[1,2];Song, Leibo[2];Han, Guansheng[2];Chen, Wenzhao[3];Chen, Hao[2]

机构：[1]Wuhan Univ, Sch Civil Engn, Key Lab Geotech & Struct Engn Safety Hubei Prov, Wuhan 430070, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[3]Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China

年份：2023

卷号：82

期号：1

外文期刊名：BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:000906218000001)、、EI(收录号：20230113337954)、Scopus(收录号：2-s2.0-85145354712)、WOS

基金：The authors acknowledge the financial support provided by the National Natural Science Foundation of China (Grant No. 42002275), the National Natural Science Foundation of Zhejiang province (Grant No. LQ21D020001), the Hubei Key Laboratory of Roadway Bridge and Structure Engineering (Wuhan University of Technology) (No. DQJJ202104), and the Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province (No. PCMGH-2021-03).

语种：英文

外文关键词：Strain rockburst; Stress-strength ratio; Stress gradient; Rockburst intensities; Rockburst prediction

外文摘要：Rockburst is a common geological disaster in the process of deep rock excavation, and stress gradient is an important factor affecting rockburst. In this paper, the concept of "stress concentration " was proposed. The relevant data of a large number of engineering rockburst cases were statistically analyzed, and a new rockburst criterion of stress-strength ratio considering stress gradient of surrounding rock was established. The research results revealed that the rockburst criterion considering the stress gradient distribution of surrounding rock could effectively overcome the problem of non-uniform division of rockburst criteria in the traditional strength-to-stress ratio. It can fully reflect the influence of tunnel size effect on rockburst. There was a significant correlation between rockburst strength and stress gradient, and different rockburst strengths showed obvious zoning concentration phenomenon on the two-dimensional plane. The established rockburst criterion considering the stress intensity ratio of surrounding rock had strong applicability, and the prediction accuracy could reach more than 90%. The proposed rockburst criterion in this paper has certain theoretical and engineering guiding value for the early warning of underground engineering disasters.