Influence of throat topography on the kinematics of rock avalanches
文献类型：期刊论文
| 作者 | Guo, Jian1,2; Cui, Yifei2; Yin, Yanzhou2; Wang, Guodong2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 17期号:11页码:7250-7264 |
| 关键词 | Throat topography Rock avalanche Granular flow kinematics Flow rate Hopper flow |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2025.03.061 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The impact of cross-sectional topographic variability on the kinetic properties of granular flows has been underexplored, which hinders the understanding of the kinematics of rock avalanches. In this study, the throat contraction index (T) is introduced to quantify variations in throat topography, and 96 numerical simulation experiments with varying T and slope angles (delta) are conducted. The findings indicate that granular flows experience transient obstructions when traversing throat topographies, primarily due to the periodic formation and breaking of the arch structure. Observations suggest that the acceleration of velocity in the tails of granular flows is restrained by the throat region, potentially altering the dynamics of related geohazards. In this study, the impact of throat topography is quantitatively assessed, demonstrating a reduction in peak flow rates of granular materials by 20%-80% and extending the flow duration up to six times. The present study proposes the throat-induced hazard index (Phi) to evaluate the influence of throat topography on the risk of rockslides and avalanches characterized by granular flows, which may provide insights for the design of mitigation structures in topographic regions. (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/). |
| URL标识 | 查看原文 |
| WOS关键词 | DEBRIS-FLOW ; LANDSLIDE ; FAILURE ; MODEL |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001620412800022 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/217745]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Cui, Yifei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China; 2.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Jian,Cui, Yifei,Yin, Yanzhou,et al. Influence of throat topography on the kinematics of rock avalanches[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2025,17(11):7250-7264. |
| APA | Guo, Jian,Cui, Yifei,Yin, Yanzhou,&Wang, Guodong.(2025).Influence of throat topography on the kinematics of rock avalanches.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,17(11),7250-7264. |
| MLA | Guo, Jian,et al."Influence of throat topography on the kinematics of rock avalanches".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17.11(2025):7250-7264. |
入库方式： OAI收割
来源：地理科学与资源研究所
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