压剪应力作用下岩石变形破裂全程动态监测研究

Wholly Dynamic Testing Study of Rock Deformation and Fracture under Compressive and Shearing Stress

将实时激光全息干涉测量系统与岩石力学压剪加载系统相结合,通过图像采集系统实时动态捕获了压剪应力作用下板岩岩样压剪破坏过程的实时全息图.定量计算和描述了岩石裂纹扩展速率、演化路径和破坏形态.为岩石损伤断裂力学的实验测量探索出一条新途径.

In this paper the optical layout for real-time laser holographic interferometry and the loading apparatus for rock under compression and shear are optimal matched.With the digital im-age instrument,the real-time holographic interferograms for the wholly failure process of rock un-der compressive-shearing stress are continuously captured.Based on the interpretations of interfer-ence fringes on slates samples,it is quantitative calculation and description for the cracking rates of microcracks,the paths of cracks evaluation,the character of slates failure,and provides a new effective method for the experimental measurements of mechanics of rock damage and fracture.