Shearing Performance of Natural Joints with Different Roughnesses under Direct Shearing Tests
文献类型：期刊论文
| 作者 | Zhang, Yang; Song, Jinliang; Hu, Dawei; Liu, Yuzhang; Zhou, Fujian |
| 刊名 | GEOFLUIDS
 |
| 出版日期 | 2022-03-26 |
| 卷号 | 2022 |
| ISSN号 | 1468-8115 |
| 英文摘要 | Roughness is one of the major characteristics of natural fracture in hydrocarbon and geothermal reservoirs, which has a significant influence on the activation of fractures during hydraulic stimulation. The main purpose of this study is to investigate the effect of different roughnesses and high normal stresses on shear behaviors of rock joints. To do this, replicas of natural rock joint surfaces were constructed using the 3D optical scanning and 3D rigid engraving technique. Direct shear tests were performed on rock joint replicas with three joint roughness coefficient (JRC) indices (i.e., 1.42, 4.98, and 7.96) at two high normal load conditions (i.e., 15 and 30MPa). The results show that the shear strength dependence on surface roughness is similar at normal stresses of 15 and 30MPa. In addition, JRC-JCS shear strength criterion can reasonably describe the peak shear strengths that obtained from experimental curves, and the peak shear stresses have a positive correlation with JRC values at both normal stresses. Moreover, at normal stresses of 15 and 30MPa, the shearing mechanism of joints with different JRC values is asperity shearing off. Results also show that the friction coefficient of joint surface increases as joint roughness increases, and higher normal loads may lead to a decrease of apparent cohesion, which weakens the residual strength during the slip. The results of this study improve insight into the natural fracture activation behavior during hydraulic fracturing. |
| 学科主题 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000820194800001 |
| 出版者 | WILEY-HINDAWI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34878]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.China University of Petroleum; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Zhang, Yang,Song, Jinliang,Hu, Dawei,et al. Shearing Performance of Natural Joints with Different Roughnesses under Direct Shearing Tests[J]. GEOFLUIDS,2022,2022. |
| APA | Zhang, Yang,Song, Jinliang,Hu, Dawei,Liu, Yuzhang,&Zhou, Fujian.(2022).Shearing Performance of Natural Joints with Different Roughnesses under Direct Shearing Tests.GEOFLUIDS,2022. |
| MLA | Zhang, Yang,et al."Shearing Performance of Natural Joints with Different Roughnesses under Direct Shearing Tests".GEOFLUIDS 2022(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。