三轴条件下软岩变形破坏过程的CT图像分析

基金项目:

陕西省教育厅专项科研计划项目(No.00JK218、No.01JK146)资助

国家自然科学基金项目(No.10172071)

详细信息

The CT image analysis on the soft rock deformation and damage process under triaxial condition

1. Institute of Water Resources and Hydro electric Engineering, Xi'an University of Technology, Xi'an 710048, China;
2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

摘要: 采用X射线CT方法对一种软弱粉砂岩在三轴压缩条件下的变形破坏过程进行了实时观测,获得系列CT图像。软岩破裂成核现象在远离强度峰值前发生,完整岩石试件裂纹从外向内传播,裂纹演化基本方式表现为扩张和扩展的交替性。软岩屈服现象的本质是CT尺度裂纹演化,裂纹演化是软岩在峰值强度前的主要细观过程。
- 软岩 /
- CT /
- 裂纹演化
Abstract: A real time X ray CT detecting is conducted to the soft rock deformation and damage process under triaxial condition and a series of images are gained.The crack nucleation of the soft rock occurs far from the strength maximum.The crack propagates from the margin to the internal for a intact sample.The main evolution style is in turn between propagation and enlargement of crack.The yield point is based on the evolution crack on CT scale and the meso process of soft rock before the strength maximum is the evolution of crack on CT scale.
- soft rock /
- CT /
- crack evolution