Shear behaviours and roughness degeneration based on a quantified rock joint surface description

作     者：Shubo Zhang Gang Wang Yujing Jiang Changsheng Wang Feng Xu Shubo Zhang;Gang Wang;Yujing Jiang;Changsheng Wang;Feng Xu

作者机构：Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and MitigationShandong University of Science and TechnologyQingdao 266590China College of Civil EngineeringFujian University of TechnologyFuzhou 350118China Graduate School of EngineeringNagasaki UniversityNagasaki 852-8521Japan 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2023年第33卷第10期

页      面：1301-1316页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：the financial support from the National Natural Science Foundation of China(Nos.52079077 and 52209141) the Natural Science Foundation of Shandong Province,China(No.ZR2021QE069) 

主　　题：Rock joint Roughness Shear behaviour Wear Asperity 

摘      要：The asperity wear of rock joints significantly affects their shear *** study discusses the wear damage of the asperities on the joint surface,highlighting the roughness degradation characteristics during the shear *** direct shear experiment of artificial specimens containing rock joints was conducted under different normal stresses based on three-dimensional scanning *** experimental results showed the contribution of joint wear to roughness degeneration,such as the height,zone,and volume of asperity *** wear coefficient of the rock joint was obtained based on the volume wear of asperities in the laboratory *** functional relationship between the friction coefficient and wear coefficient is subsequently *** quantitatively analyse the wear damage of a joint surface,a calculation method for determining the wear depth of the rock joint after shearing was proposed based on wear *** relationship between the ultimate dilation and wear depth was analysed.A coefficient m,which can describe the damage degree of the joint surface,and a prediction method of joint surface roughness after shearing are *** agreement between analytical predictions and measured values demonstrates the capability of the developed ***,the sensitivity factors on the wear depth are explored.