Energy evolution and failure characteristics of single fissure carbonaceous shale under drying-wetting cycles

LIU Xin-xi; LI Yu; FAN Zi-jian; LI Sheng-nan; WANG Wei-wei; DONG Peng

doi:10.16285/j.rsm.2021.1657

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Energy evolution and failure characteristics of single fissure carbonaceous shale under drying-wetting cycles

更新时间：2026-06-25

- Energy evolution and failure characteristics of single fissure carbonaceous shale under drying-wetting cycles
- Vol. 43, Issue 7, Pages: 1761-1771(2022)
- 作者机构：
  
  1. 长沙理工大学土木工程学院,湖南,长沙,410114
  2. 湖南工程学院建筑工程学院,湖南,湘潭,411101
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2021.1657
  CLC： U416.1
- Online First：03 August 2022，
  
  Published：2022
- 稿件说明：
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LIU Xin-xi, LI Yu, FAN Zi-jian, et al. Energy evolution and failure characteristics of single fissure carbonaceous shale under drying-wetting cycles[J]. 2022, 43(7): 1761-1771.
DOI：

LIU Xin-xi, LI Yu, FAN Zi-jian, et al. Energy evolution and failure characteristics of single fissure carbonaceous shale under drying-wetting cycles[J]. 2022, 43(7): 1761-1771. DOI： 10.16285/j.rsm.2021.1657.

摘要

为研究干湿循环作用下裂隙炭质页岩能量演化及破坏特征，分别制作完整和裂隙倾角为30°、45°和60°的炭质页岩，利用MTS815岩石力学试验系统进行不同干湿循环作用下的三轴压缩试验，研究了干湿循环对单裂隙炭质页岩强度、破坏模式及能量演化的影响。结果表明：起裂应力、损伤应力和峰值应力处弹性能和耗散能与干湿循环呈指数函数关系；起裂应力处弹性能、耗散能和损伤应力处耗散能对干湿循环的敏感程度较低，损伤应力处弹性能和峰值应力处弹性能、耗散能对干湿循环的敏感程度较高。炭质页岩破坏模式受控于干湿循环和裂隙倾角，干湿循环为主控因素，裂隙倾角为次控因素；裂隙倾角为30°的干燥岩样为拉剪破坏，裂隙倾角为45°和60°的干燥岩样为剪切破坏；随着干湿循环次数的增加，宏观主裂纹长度增大，次要裂纹增加，破坏模式整体上向剪拉破坏发展。随着干湿循环次数的增加，起裂应力处储能水平和损伤应力处储能水平逐渐增大，起裂和损伤应力处储能水平越高，岩石起裂和损伤更容易；可作为岩石破坏的预警指标，越大，岩石越易发生破坏

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