土木与环境工程学报（中英文）2025，Vol.47Issue(3)：102-112,11.DOI:10.11835/j.issn.2096-6717.2023.054
基于三维离散元的岩爆突变点处动力行为与能量演化研究
Dynamic behavior and energy evolution at rockburst mutation moment based on DEM
摘要
Abstract
The dynamic behavior and energy evolution of rockburst at the moment of sudden instability are the key to reveal rockburst formation mechanism.Based on the instability theory and stiffness theory,a combination model consists of rockburst body and its surrounding rock was established using the three-dimension discrete element method(DEM).With it the energy evolution process of the system is visualized through secondary development and the ejection phenomenon of rockburst is simulated successfully.Based on the numerical simulation,the tempo characteristics and energy evolution patterns of instability of the system are studied.The results show that the rockburst rock body reaches the peak stress slightly earlier than the surrounding rock body.The rupture and softening of the rockburst body after the peak stress results in the unloading of the surrounding rock body,and causes its stress change from increases to decreases.The surrounding rock mass then has a rapid rebound deformation to the rockburst body,and the elastic energy stored in the surrounding rock body converges to the rockburst body.In this process,the positive feedback regulation mechanism formed by the interaction of the two subsystems accelerates the fracture process and finally leads to dynamic instability.The research results can provide theoretical reference and technical support for further revealing the rockburst mechanism.关键词
岩爆/突变点/动力行为/能量演化/离散元Key words
rockburst/mutation moment/dynamic behavior/energy evolution/discrete element method分类
建筑与水利引用本文复制引用
魏蕤,赵程,钱源..基于三维离散元的岩爆突变点处动力行为与能量演化研究[J].土木与环境工程学报（中英文）,2025,47(3):102-112,11.基金项目
国家自然科学基金(U196510013、U22A20597) National Natural Science Foundation of China(Nos.U196510013,U22A20597) （U196510013、U22A20597）
