防灾减灾工程学报2024，Vol.44Issue(3)：660-669,10.DOI:10.13409/j.cnki.jdpme.20221213002
高地应力下深部硐室底鼓破坏围岩稳定性分析
Analysis on the Stability of Surrounding Rock Damaged by the Floor Drum of Deep Underground Chamber under High In-situ Stress
摘要
Abstract
In order to study the stability issues of deep underground chambers under high in-situ stress in China's western mountainous areas,based on the theory of the Proctodyakonov's pressure arch,considering the roof caving,sidewall instability,and floor drumming of deep underground chambers,a floor drumming damage model of deep underground chambers under high in-situ stress was estab-lished.Leveraging limit analysis upper bound method and nonlinear Hoek-Brown failure criterion,the theoretical formula of surrounding rock pressure in the deep underground chambers under this damage mode was deduced.The upper bound solution for surrounding rock pressure was obtained.Compara-tive analysis was conducted between the results of this study,numerical simulations,and existing liter-ature.Furthermore,the influence of various parameters on surrounding rock pressure and potential failure surface was studied through this damage mode.The results showed that:1)With an increase in the initial stress field parameters σv and λ,the surrounding rock pressure q of deep underground cham-bers gradually increased,along with the expansion of potential failure surfaces,among which σv was particularly significant.2)The increase of GSI,σci and mi in the Hoek-Brown failure criterion parame-ters had a significant improvement effect on the stability of the surrounding rock,while an increase in D reduced the stability of the chamber's surrounding rock.3)With the increase in the bottom pressure correlation coefficient μ,the surrounding rock pressure of the roof and sidewalls tended to decrease.The findings provide effective theoretical support for the design of support systems for deep under-ground chambers.关键词
高地应力/硐室底鼓/破坏模式/围岩压力/Hoek-Brown破坏准则Key words
high in-situ stress/floor drumming in underground chamber/damage mode/surrounding rock pressure/Hoek-Brown failure criterion分类
建筑与水利引用本文复制引用
张道兵,尹华东,胡阿平,朱远嫘,彭学军,张升,安方信..高地应力下深部硐室底鼓破坏围岩稳定性分析[J].防灾减灾工程学报,2024,44(3):660-669,10.基金项目
国家自然科学基金面上项目(52074116)、湖南省教育厅科学研究优秀青年项目(23B0476)资助 （52074116）
