人民珠江2025，Vol.46Issue(1)：69-77,9.DOI:10.3969/j.issn.1001-9235.2025.01.008
考虑周边岩体约束的危岩体稳定性分析极限平衡法
Limit Equilibrium Method for Stability Analysis of Dangerous Rock Considering Surrounding Rock Constraints
摘要
Abstract
The current code exhibits limitations in conducting stability analyses of dangerous rock with complex shapes and fails to consider the effects of multiple structural planes.This study improved the existing limit equilibrium method according to the characteristics of dangerous rock with complex shapes and shear stress distribution based on three-dimensional discrete element calculation.The proposed method considered the constraint effects of the back margin for dangerous rock of falling and sliding types with structural surfaces controlled by the upper margin and lower margin,respectively.For sliding-type dangerous rock with double structural surfaces,the influence of the fissure water pressure on the back margin was considered.The stability analysis of these three types of dangerous rock was conducted by the improved limit equilibrium method.Compared with the simulation results of the three-dimensional discrete method,it is shown that the improved formula can be used to calculate the stability coefficients of dangerous rock with different complex shapes under the influence of multiple structural planes.The relative error is only 3.06%～9.10%.Compared with a relative error of 13.8%～14.7%of the recommended formula in the code,the calculation accuracy is significantly improved.The improved formula fully considers the characteristics of the surrounding constraints of dangerous rock,providing an idea for the limit equilibrium method to address challenges associated with dangerous rock with complex shapes.关键词
危岩/离散元/极限平衡法Key words
dangerous rock/discrete element/limit equilibrium method分类
天文与地球科学引用本文复制引用
苏国韶,张吉祥,刘友能,王钧沐..考虑周边岩体约束的危岩体稳定性分析极限平衡法[J].人民珠江,2025,46(1):69-77,9.基金项目
国家自然科学基金资助项目(52169021) （52169021）
广西科技基地和人才专项项目(桂科AD23026203) （桂科AD23026203）
