不同应力状态下采场稳定性的数值模拟分析

摘要

In order to investigate factors governing the stability of stope under excavation, numerical simulation was conducted with ABAQUS finite element software for the stability of stope under different stress conditions. It can be concluded from the analysis that the coefficient of lateral pressure approaching to 1 can increase the safety in excavation. An elevated initial stress can slow down the increase rate of stress in the process of stress redistribution caused by excavation, while an elevated initial lateral stress is beneficial to releasing the post⁃excavation stress, thus reducing the vertical stress at the side wall after excavation.%为研究开挖影响采场稳定性的应力因素，利用ABAQUS有限元分析软件，对不同应力状态下的采场稳定性进行了数值模拟，结果表明：当侧压力系数接近于1时有利于开挖的安全性；初始应力增大有利于减小开挖引起的应力重分布过程中的应力增加；初始侧向应力增加有利于开挖后的应力释放，有利于减小开挖后边壁处的竖向应力。