文献类型：期刊文献

英文题名：A High-Resolution Contact Analysis of Rough-Walled Crystalline Rock Fractures Subject to Normal Stress

作者：Zou, Liangchao[1];Li, Bo[2];Mo, Yangyang[2];Cvetkovic, Vladimir[1]

机构：[1]Royal Inst Technol, Dept Sustainable Dev Environm Sci & Engn, Div Resources Energy & Infrastruct, S-10044 Stockholm, Sweden;[2]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China

年份：2020

卷号：53

期号：5

起止页码：2141

外文期刊名：ROCK MECHANICS AND ROCK ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000534789200009)、、EI(收录号：20195307950905)、Scopus(收录号：2-s2.0-85077044773)、WOS

基金：The first and fourth authors have been partly supported for this work by a grant from the Swedish Nuclear Fuel and Waste Management Co (SKB). The experimental work of this study and the second author has been partially funded by National Natural Science Foundation of China (No. 51609136), Natural Science Foundation of Zhejiang Province, China (No. LR19E090001), and open research funding provided by the Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province, China (Grant number PCMGH-2016-Y-01). All supports are gratefully acknowledged.

语种：英文

外文关键词：Fracture closure; Normal stress; Elastic-plastic contact; Surface roughness; Fracture-specific stiffness; Wavelet analysis

外文摘要：Analysis of rock fracture deformation by normal stress is important for quantifying hydromechanical properties of fractured rocks that are related to a large number of geophysical problems and geoengineering applications. Experimental and numerical results for the closure of crystalline rock fractures subject to normal stress are presented in this study. An efficient high-resolution, half-space elastic-plastic contact model for analyzing the closure of crystalline rock fractures based on the Boussinesq's solution is validated by high-precision and high-resolution experimental data. Using the validated elastic-plastic model, we investigate the correlation between fracture-specific stiffness and multi-scale surface roughness. The wavelet analysis method and the extended averaged slope magnitude for asperity heights (referred to as Z23Dare introduced to characterize the multi-scale surface roughness. The results show that the elastic-plastic contact model is effective and precise in modeling the closure of crystalline rock fractures, which matches better with the test results than the elastic model. The multi-scale features of surface roughness can be well characterized by the wavelet analysis and the extended roughness parameter Z23D The specific stiffness is nonlinearly correlated with the multi-scale surface roughness that possibly follows a power law. The validated elastic-plastic contact model and the multi-scale surface roughness characterization methods, as well as the nonlinear correlation between the specific stiffness and the multi-scale surface roughness presented in this study, are helpful for evaluating the dependence of mechanical behaviors of rock fractures on its multi-scale surface roughness.