Model study of strength and failure modes of rock mass with persistent cracks

HAN Jian-xin; LI Shu-cai; LI Shu-chen; TONG Xing-hua; LI Wen-ting

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Model study of strength and failure modes of rock mass with persistent cracks

更新时间：2026-06-25

- Model study of strength and failure modes of rock mass with persistent cracks
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  1. 山东大学岩土与结构工程研究中心,济南,250061
  2. 山东财政学院统计与数理学院,济南,250014
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU457
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
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HAN Jian-xin, LI Shu-cai, LI Shu-chen, et al. Model study of strength and failure modes of rock mass with persistent cracks[J]. 2011, 32(S2).
DOI：

HAN Jian-xin, LI Shu-cai, LI Shu-chen, et al. Model study of strength and failure modes of rock mass with persistent cracks[J]. 2011, 32(S2). DOI：

摘要

隧道等洞室开挖后，其周边通常会产生许多贯穿裂隙，直接影响到围岩稳定。研究贯穿裂隙岩体的强度及其破坏方式对于围岩加固等具有重要意义。基于库伦强度准则，通过建立数学模型，利用 - 坐标系下裂隙面和岩块的强度曲线位置关系研究了贯穿裂隙岩体强度和破坏方式。探讨了贯穿裂隙岩体强度与裂隙面的倾斜角、黏聚力和内摩擦角及岩块的黏聚力和内摩擦角间的关系，得到了贯穿裂隙岩体破坏方式的相关判据。数值算例表明该模型能够预测在任意最小主应力下贯穿裂隙岩体的强度和任意加卸荷路径下岩体破坏方式，与传统的利用 - 坐标系下裂隙面、岩块的强度曲线和摩尔应力圆的位置关系来判断岩体破坏方式的方法相比，该模型的方法更简便有效，结论更直观，能更好地为工程设计和岩体加固提供技术支撑。

Abstract

After excavation of tunnel and so on

the surrounding rock mass of them usually generates a lot of persistent cracks which directly affect the stability of surrounding rock mass. It is important for reinforcement of surrounding rock mass to study the strength and failure modes of the rock mass with persistent cracks. On the basis of Coulomb strength criterion

the strength and failure modes of rock mass are studied based on the location relationship of strength curve of cracks and rock in - coordinate system by setting up the mathematical model. The relationships between strength of rock mass and the dip

cohesion

internal friction angle of cracks are explored. The relationships between strength of rock mass and the cohesion

internal friction angle of rock are also studied. The related judgment of failure modes of rock mass with persistent cracks is obtained. Numerical results show that the model can predict the strength and failure modes of the rock mass with persistent cracks under any minor principal stress along any loading and unloading paths. In order to judge the failure modes of rock mass

the traditional method usually need to compare the location of strength curve of cracks

strength curve of rock and Mohr’s circle of stress in - coordinate system. Compared with traditional method

the method of the model is more effective. The conclusion is more intuitive. So the model can better provide technical support for engineering design and reinforcement of rock mass.

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