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Experimental and Numerical Investigations of the Dynamic Permeability Evolution of a Fracture in Granite During Shearing Under Different Normal Stress Conditions

文献类型：期刊论文

作者Shen, Haimeng2,4; Zhang, Qiang1,3; Li, Qi4; Li, Xiaochun4; Shi, Lu4; Shen, Nao2,4
刊名ROCK MECHANICS AND ROCK ENGINEERING
出版日期2020-03-02
页码19
关键词Joints Shear-flow coupling PFC Smooth joint model Contact area Shear mechanism
ISSN号0723-2632
DOI10.1007/s00603-020-02074-7
英文摘要The dynamic permeability evolution of a fracture is a key scientific problem for fluid flows in rock masses within engineering systems. Understanding the dynamic permeability evolution and its mechanism is conducive to design and operation engineering. The dynamic permeability evolution of a rough granite fracture was revealed by laboratory experiments and numerical models. The permeability evolution of six fractured samples with rough fractures were monitored under 1.9-20 MPa effective normal stresses. The results show that the shearing process significantly affects the permeability and that the variation trend of the permeability depends on the magnitude of the effective normal stress. Under effective normal stresses of 1.9-5 MPa, the permeability is first significantly enhanced and then decreased by shearing. When effective normal stresses of more than 5 MPa are applied, the permeability only shows a decreasing trend. A high effective normal stress not only limits the dilatancy of a fracture but also enhances the formation of fault gouges. The mechanism of the dynamic permeability evolution was revealed by numerical simulations based on the discrete element method. The shearing mechanism includes the sliding mechanism and shearing mechanism. Under a low normal stress, first, the sliding mechanism is dominant and decreases the contact area, which is conducive to establishing a flow channel and increases the permeability. Then, the shearing mechanism becomes increasingly impactful, causing the contact area to increase and the permeability to decrease. Under a high normal stress, the sliding and shearing mechanisms are always engaged, which generates many wear products and reduces the permeability.
资助项目National Key R&D Program of China[2016YFB0600805] ; Youth Fund of the National Natural Science Foundation of China[41702289] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z017008]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000517721500004
出版者SPRINGER WIEN
源URL[http://119.78.100.198/handle/2S6PX9GI/23573]  
专题中科院武汉岩土力学所
通讯作者Zhang, Qiang
作者单位1.Powerchina Zhejiang Huadong Engn Consulting Corp, Hangzhou 311122, Zhejiang, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Powerchina Huadong Engn Corp Ltd, Hangzhou 311122, Zhejiang, Peoples R China
4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Shen, Haimeng,Zhang, Qiang,Li, Qi,et al. Experimental and Numerical Investigations of the Dynamic Permeability Evolution of a Fracture in Granite During Shearing Under Different Normal Stress Conditions[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020:19.
APA Shen, Haimeng,Zhang, Qiang,Li, Qi,Li, Xiaochun,Shi, Lu,&Shen, Nao.(2020).Experimental and Numerical Investigations of the Dynamic Permeability Evolution of a Fracture in Granite During Shearing Under Different Normal Stress Conditions.ROCK MECHANICS AND ROCK ENGINEERING,19.
MLA Shen, Haimeng,et al."Experimental and Numerical Investigations of the Dynamic Permeability Evolution of a Fracture in Granite During Shearing Under Different Normal Stress Conditions".ROCK MECHANICS AND ROCK ENGINEERING (2020):19.

入库方式： OAI收割

来源：武汉岩土力学研究所

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