人民珠江2025，Vol.46Issue(11)：24-34,11.DOI:10.3969/j.issn.1001-9235.2025.11.004
梯度应力作用下隧洞岩爆破裂特性RA-AF-E分类研究
Research on RA-AF-E Classification of Rockburst Fracture Characteristics in Tunnels under Gradient Stresses
摘要
Abstract
Rockburst disasters currently constitute a critical challenge constraining the development of deep underground engineering.During underground excavation,the tangential stress of the surrounding rock exhibits a gradient distribution.To investigate the fracture characteristics of surrounding rock with rockbursts under varying gradient stresses along the tunnel's tangential direction and understand various phenomena during rockburst occurrence,this study conducted four sets of rockburst tests under different gradient stress loadings using a self-developed triaxial rockburst testing apparatus(Phoxinus phoxinus subsp.phoxinus),based on the stress path experienced by the surrounding rock during excavation unloading.By analyzing the energy characteristics of different fracture types and their corresponding acoustic emission data patterns,the failure modes of internal fracture points during rockbursts were determined,revealing the microscopic mechanisms of internal crack evolution in the model under different gradient stresses during rockbursts.The results indicate that stress gradient significantly influences the surrounding rock's fracture mode during rockbursts,leading to diverse rockburst phenomena.As the stress gradient increases,the model transitions from tensile-dominated rockburst to shear-dominated rockburst,with increasingly pronounced rockburst intensity.The rockburst failure exhibits a coexisting fracture pattern combining tensile,shear,and tensile-shear composite modes.Under varying stress gradients,tensile failure consistently accounts for a major proportion in rockburst damage,while shear cracks and tensile-shear mixed-mode fracture gradually increase their proportion with rising stress gradients.关键词
岩爆/应力梯度/气液复合加载/破裂特性/岩爆烈度Key words
rockburst/stress gradient/gas-liquid composite loading/rupture characteristic/rockburst intensity分类
建筑与水利引用本文复制引用
黄兵,刘夕奇,黄志怀,丁腾腾,王刚..梯度应力作用下隧洞岩爆破裂特性RA-AF-E分类研究[J].人民珠江,2025,46(11):24-34,11.基金项目
国家自然科学基金(42407253、42407202) （42407253、42407202）
广东省基础与应用基础研究基金(2025A1515010547) （2025A1515010547）
精细爆破国家重点实验室开放基金(PBSKL25B01) （PBSKL25B01）
广东省科协青年科技人才培育计划(SKXRC2025075) （SKXRC2025075）
