An Experimental Investigation on the Foliation Strike-Angle Effect of Layered Hard Rock under Engineering Triaxial Stress Path
文献类型：期刊论文
| 作者 | Wang, Zhaofeng1,3; Feng, Guangliang1,3; Liu, Xufeng1,3; Zhou, Yangyi2 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 16期号:17页码:17 |
| 关键词 | layered rock strike angle foliation true triaxial stress anisotropy |
| DOI | 10.3390/ma16175987 |
| 英文摘要 | Deep underground engineering encounters substantial layered hard rock formations, and the engineering triaxial stress path involves an increase in maximum principal stress, constant intermediate principal stress, and a decrease in minimum principal stress. However, previous research has focused on rock layer angles under conventional triaxial stress conditions, disregarding the influence of foliation strike angles in engineering triaxial stress scenarios. This study experimentally investigates the effects of foliation strike angles on layered hard rock under an engineering triaxial stress path. To account for the brittleness of layered hard rock, we propose a specific small sample-processing method tailored to the foliation strike angle. True triaxial loading tests are conducted on steep, thin slate samples with two different loading orientations, accompanied by acoustic emission monitoring. Results indicate that the strength under a traditional true triaxial compression condition is similar for specimens with 90 & DEG; and 0 & DEG; strike angles. Stress-strain curves show that larger deformations occur perpendicular to bedding planes, while surface fractures propagate exclusively along the bedding planes. Mechanical responses differ significantly between specimens subjected to the engineering triaxial stress path at 0 & DEG; and 90 & DEG; strike angles compared to conventional true triaxial loading tests, with a lower bearing capacity and differentiated intermediate and minimum principal strains in the 0 & DEG; case. Conversely, the 90 & DEG; case exhibits a higher bearing capacity, consistent deformation, and more acoustic emission events. Numerical simulations comparing plastic zone sizes during actual underground excavation support these conclusions. These findings highlight the effects of foliation strike angles, favoring the 90 & DEG; strike-angle configuration for excavation activities and providing enhanced stability in the surrounding rock mass. |
| 资助项目 | The authors also like to thank Yang-Yang Cui, Liang-Jie Gu for their assistance in specimen preparation and testing. |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001062108200001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39366]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Feng, Guangliang |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Northeastern Univ, Key Lab Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Zhaofeng,Feng, Guangliang,Liu, Xufeng,et al. An Experimental Investigation on the Foliation Strike-Angle Effect of Layered Hard Rock under Engineering Triaxial Stress Path[J]. MATERIALS,2023,16(17):17. |
| APA | Wang, Zhaofeng,Feng, Guangliang,Liu, Xufeng,&Zhou, Yangyi.(2023).An Experimental Investigation on the Foliation Strike-Angle Effect of Layered Hard Rock under Engineering Triaxial Stress Path.MATERIALS,16(17),17. |
| MLA | Wang, Zhaofeng,et al."An Experimental Investigation on the Foliation Strike-Angle Effect of Layered Hard Rock under Engineering Triaxial Stress Path".MATERIALS 16.17(2023):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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