Failure Characteristics and Scale in a Sandstone Joint Subjected to Direct Shear Testing: Experimental Investigation with Acoustic Emission Monitoring
文献类型：期刊论文
| 作者 | Lin, Chang2,3; Feng, Guang-Liang2,4; Zhu, Chun1,2; Xu, Ding-Ping2 |
| 刊名 | LITHOSPHERE
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 10期号:-页码:- |
| ISSN号 | 1941-8264 |
| 英文摘要 | An in-depth recognition of the failure characteristics and scale of joints is of great significance for the stability assessment in rock engineering. Unfortunately, due to the close fitting of the upper and lower blocks of the joint under direct shear tests, the shear failure of joints are difficult to observe directly during the shear process. Thus, in this work, direct shear tests were carried out on sandstone joints subjected to three levels of normal stress while the acoustic emission (AE) in the rock is synchronously monitored. The failure characteristics of rock joints were then investigated by calibrating the AE system and combining them with the AE location results and shear load curves. A method was established to determine the failure scale of the rock joint that uses the AE moment tensor and first law of thermodynamics. The results show that the degree of failure of the rock joints increases as the normal stress increases. Also, the shear failure of the rock joints is localized and occurs synchronously, rather than sequentially in different areas. The average length of the microfractures formed in the shear process correlates with the average mineral grain size. On the other hand, the maximum length of the microfractures appears to have different values depending on the normal stress present. Our results have significant reference value for the precursory identification of shear disaster in engineering rock masses. |
| 学科主题 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000917342000001 |
| 出版者 | GEOSCIENCEWORLD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35386]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.University of Chinese Academy of Sciences, Beijing 100049, China 4.Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530000, China |
| 推荐引用方式 GB/T 7714 | Lin, Chang,Feng, Guang-Liang,Zhu, Chun,et al. Failure Characteristics and Scale in a Sandstone Joint Subjected to Direct Shear Testing: Experimental Investigation with Acoustic Emission Monitoring[J]. LITHOSPHERE,2022,10(-):-. |
| APA | Lin, Chang,Feng, Guang-Liang,Zhu, Chun,&Xu, Ding-Ping.(2022).Failure Characteristics and Scale in a Sandstone Joint Subjected to Direct Shear Testing: Experimental Investigation with Acoustic Emission Monitoring.LITHOSPHERE,10(-),-. |
| MLA | Lin, Chang,et al."Failure Characteristics and Scale in a Sandstone Joint Subjected to Direct Shear Testing: Experimental Investigation with Acoustic Emission Monitoring".LITHOSPHERE 10.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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