Shear behavior and off-fault damage of saw-cut smooth and tension-induced rough joints in granite
文献类型：期刊论文
| 作者 | Meng, Fanzhen3; Wang, Feili3; Wong, Louis Ngai Yuen4; Song, Jie3; Li, Muzi3; Zhang, Chuanqing2; Zhang, Liming1,3 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 16期号:4页码:1216-1230 |
| 关键词 | Planar joint Rough joint Shear behavior Off-fault damage Micro-cracks |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.07.008 |
| 英文摘要 | The damage of rock joints or fractures upon shear includes the surface damage occurring at the contact asperities and the damage beneath the shear surface within the host rock. The latter is commonly known as off-fault damage and has been much less investigated than the surface damage. The main contribution of this study is to compare the results of direct shear tests conducted on saw-cut planar joints and tension-induced rough granite joints under normal stresses ranging from 1 MPa to 50 MPa. The shearinduced off-fault damages are quantified and compared with the optical microscope observation. Our results clearly show that the planar joints slip stably under all the normal stresses except under 50 MPa, where some local fractures and regular stick-slip occur towards the end of the test. Both post-peak stress drop and stick-slip occur for all the rough joints. The residual shear strength envelopes for the rough joints and the peak shear strength envelope for the planar joints almost overlap. The root mean square (RMS) of asperity height for the rough joints decreases while it increases for the planar joint after shear, and a larger normal stress usually leads to a more significant decrease or increase in RMS. Besides, the extent of off-fault damage (or damage zone) increases with normal stress for both planar and rough joints, and it is restricted to a very thin layer with limited micro-cracks beneath the planar joint surface. In comparison, the thickness of the damage zone for the rough joints is about an order of magnitude larger than that of the planar joints, and the coalesced micro-cracks are generally inclined to the shear direction with acute angles. The findings obtained in this study contribute to a better understanding on the frictional behavior and damage characteristics of rock joints or fractures with different roughness. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | Taishan Scholars Program[2019KJG002] ; National Natural Science Foundation of China[42272329] ; National Natural Science Foundation of China[52279116] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001271906900001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42101]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wong, Louis Ngai Yuen |
| 作者单位 | 1.Cooperat Innovat Ctr Engn Construct & Safety Shan, Qingdao 266033, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomechan & Geotech Engn, Wuhan 430071, Peoples R China 3.Qingdao Univ Technol, Coll Sci, Qingdao 266033, Peoples R China 4.Univ Hong Kong, Dept Earth Sci, Pokfulam, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Fanzhen,Wang, Feili,Wong, Louis Ngai Yuen,et al. Shear behavior and off-fault damage of saw-cut smooth and tension-induced rough joints in granite[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(4):1216-1230. |
| APA | Meng, Fanzhen.,Wang, Feili.,Wong, Louis Ngai Yuen.,Song, Jie.,Li, Muzi.,...&Zhang, Liming.(2024).Shear behavior and off-fault damage of saw-cut smooth and tension-induced rough joints in granite.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(4),1216-1230. |
| MLA | Meng, Fanzhen,et al."Shear behavior and off-fault damage of saw-cut smooth and tension-induced rough joints in granite".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.4(2024):1216-1230. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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