Effects of foliation angle on mechanical characteristics of carbonaceous slate using uniaxial compression tests
文献类型：期刊论文
| 作者 | Zhu, Yuanguang1,2; Wang, Xuanyao1,2; Liu, Bin1,2; Liu, Xuewei1,2; Xue, Haoyuan1,2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2025-04-01 |
| 卷号 | 17期号:4页码:2091-2108 |
| 关键词 | Carbonaceous slate Mechanical behavior Fracture mechanism Acoustic emission Anisotropy |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2024.08.012 |
| 英文摘要 | Carbonaceous slate is one kind of metamorphic rocks with developed foliation, which is frequently encountered during tunnel construction in Western China. The foliation plays a crucial role in the stability of tunnels. For this, we conducted uniaxial compression tests, acoustic emission (AE) monitoring and scanning electron microscope (SEM) tests on carbonaceous slate. The results show that the strength, failure mode, and AE characteristics exhibit marked anisotropy with the angle between the axial and the foliation (beta). As beta increases, the ultrasonic wave velocity decreases monotonically, whereas the uniaxial compressive strength (UCS) displays a distinctive U-shaped trend. The elastic modulus initially decreases and then increases. The cumulative AE counts curve and energy curve show a stepped growth when beta <= 45 degrees. The AE events are active during the crack compaction phase and remain calm during the linear elastic deformation phase when beta > 45 degrees. Upon failure, the energy release accounts for the highest proportion (67%) when beta = 45 degrees, while the proportions in other cases are less than 37%. The maximum percentage (31%) of shear cracks is reported when beta = 60 degrees, which is six times greater than that at beta = 0 degrees. Moreover, Kernel density estimation analysis reveals that the high concentration area with low AF (AE counts/duration time) and high RA (rise time/amplitude) increases initially, and then decreases when beta > 60 degrees. In addition, nine types of cracks and seven modes of failure were identified. The foliation angle has a pronounced impact on shear failure modes in comparison with tensile failure modes. The supports could suffer larger deformation when beta >= 60 degrees compared to other cases. The failure behaviors correspond well with field observations. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published 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 | National Natural Science Foun-dation of China[U22A20234] ; Hubei Province key Research and Development Project[2023BCB121] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001471987900001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35721]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Bin |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Yuanguang,Wang, Xuanyao,Liu, Bin,et al. Effects of foliation angle on mechanical characteristics of carbonaceous slate using uniaxial compression tests[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2025,17(4):2091-2108. |
| APA | Zhu, Yuanguang,Wang, Xuanyao,Liu, Bin,Liu, Xuewei,&Xue, Haoyuan.(2025).Effects of foliation angle on mechanical characteristics of carbonaceous slate using uniaxial compression tests.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,17(4),2091-2108. |
| MLA | Zhu, Yuanguang,et al."Effects of foliation angle on mechanical characteristics of carbonaceous slate using uniaxial compression tests".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17.4(2025):2091-2108. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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