The Effects of Joint Roughness on Stress Wave Propagation Based on Projection Cover Method

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Li, Miao^1 ; Qiao, Lan^1 ; Zhou, Ming^1

School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing

100083, China^1

关键词: Equivalent stiffness;    Experimental research;    Intact rocks;    Jointed rock;    Rock specimen;    Split Hopkinson pressure bars;    Stress wave propagation;    Transmission coefficients;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/4/042021/pdf
DOI  :  10.1088/1755-1315/108/4/042021

来源: IOP

【 摘 要 】

To study the influence of smooth and rough joint on stress wave propagation in rock mass and the mechanical properties of jointed rock, experimental research was carried out using Split Hopkinson Pressure Bar. The influence of fractal dimension of rock joints on stress wave propagation was studied. The results showed that the transmission coefficients and equivalent stiffness of the smooth joints rock specimen reduce very little compared to the intact rock specimen, which indicates that the smooth joints have very little influence on stress wave propagation in the experiment. The transmission coefficient and equivalent stiffness of joint rock specimen were influenced by the difference of joint forms. The bigger of the joint roughness (fractal dimension) are, the smaller of the transmission coefficient and stiffness of the rock joint specimen.