A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides
The failure of high-positioned rock slope often occurs in alpine and gorge regions of southwest China, resulting in huge casualties and economic and property losses. At present, there are many research theories and physical models for rock landslides, but these theories and models ignore the structu...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2022-05-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202107001 |
| _version_ | 1811169569430044672 |
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| author | Enming ZHANG Qiangong CHENG Qiwen LIN Yu XIE Yufeng WANG Zhiyong YAO Xianfeng SUN |
| author_facet | Enming ZHANG Qiangong CHENG Qiwen LIN Yu XIE Yufeng WANG Zhiyong YAO Xianfeng SUN |
| author_sort | Enming ZHANG |
| collection | DOAJ |
| description | The failure of high-positioned rock slope often occurs in alpine and gorge regions of southwest China, resulting in huge casualties and economic and property losses. At present, there are many research theories and physical models for rock landslides, but these theories and models ignore the structural characteristics of rock mass. However, for rockslides, the structural characteristics of rock mass not only control the failure mode of slope deformation, but also affect the fragmentation process of landslide after failure, and even the final hazard range. In this study the discrete element numerical simulation method is used to simulate the fragmentation process of rockslides under different strength of joint, densities of joint, directions of joint and strength of rock mass, and to examine the influence law and mechanism of joint and rock mass characteristics on rockslides fragment characteristics, propagation type and runout. The results show that (1) the horizontal runout of the center of mass increases with the increasing strength of the structural plane, the tensile strength of the structural plane increases by 10 times, and the horizontal runout of the center of mass increases by 3%. (2) The increase of the joint density increases the relative breakage ratio of blocks, but the runout and accumulation area show a downward trend. (3) Compared with other conditions, the runout of mass in the thin bedded rock sheared by the horizontal joint is reduced by about 10%, and the accumulation area is reduced by nearly 30%. (4) The block strength increases, the relative breakage ratio of blocks decreases, and the accumulation area is eventually reduced by 40%. When the block is intact, the runout eventually increases by about 15%. This research is helpful to further understand the fragmentation process of rock landslides and guide disaster prevention and mitigation in mountainous areas. |
| first_indexed | 2024-04-10T16:45:47Z |
| format | Article |
| id | doaj.art-b2d38d986d804a3fb76815f933dbf505 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:45:47Z |
| publishDate | 2022-05-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-b2d38d986d804a3fb76815f933dbf5052023-02-08T01:21:23ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652022-05-0149312513510.16030/j.cnki.issn.1000-3665.202107001202107001A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslidesEnming ZHANG0Qiangong CHENG1Qiwen LIN2Yu XIE3Yufeng WANG4Zhiyong YAO5Xianfeng SUN6Department of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaDepartment of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaDepartment of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaDepartment of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaDepartment of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaChina Railway First Survey and Design Institute Group Co. Ltd., Xi’an, Shaanxi 710043, ChinaChina Railway First Survey and Design Institute Group Co. Ltd., Xi’an, Shaanxi 710043, ChinaThe failure of high-positioned rock slope often occurs in alpine and gorge regions of southwest China, resulting in huge casualties and economic and property losses. At present, there are many research theories and physical models for rock landslides, but these theories and models ignore the structural characteristics of rock mass. However, for rockslides, the structural characteristics of rock mass not only control the failure mode of slope deformation, but also affect the fragmentation process of landslide after failure, and even the final hazard range. In this study the discrete element numerical simulation method is used to simulate the fragmentation process of rockslides under different strength of joint, densities of joint, directions of joint and strength of rock mass, and to examine the influence law and mechanism of joint and rock mass characteristics on rockslides fragment characteristics, propagation type and runout. The results show that (1) the horizontal runout of the center of mass increases with the increasing strength of the structural plane, the tensile strength of the structural plane increases by 10 times, and the horizontal runout of the center of mass increases by 3%. (2) The increase of the joint density increases the relative breakage ratio of blocks, but the runout and accumulation area show a downward trend. (3) Compared with other conditions, the runout of mass in the thin bedded rock sheared by the horizontal joint is reduced by about 10%, and the accumulation area is reduced by nearly 30%. (4) The block strength increases, the relative breakage ratio of blocks decreases, and the accumulation area is eventually reduced by 40%. When the block is intact, the runout eventually increases by about 15%. This research is helpful to further understand the fragmentation process of rock landslides and guide disaster prevention and mitigation in mountainous areas.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202107001rockslidesdiscrete element simulationrock mass structurefragmentationlaboratory experiments |
| spellingShingle | Enming ZHANG Qiangong CHENG Qiwen LIN Yu XIE Yufeng WANG Zhiyong YAO Xianfeng SUN A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides Shuiwen dizhi gongcheng dizhi rockslides discrete element simulation rock mass structure fragmentation laboratory experiments |
| title | A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides |
| title_full | A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides |
| title_fullStr | A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides |
| title_full_unstemmed | A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides |
| title_short | A Study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides |
| title_sort | study of the influence of rock mass structure on the propagation processes and deposit characteristics of rockslides |
| topic | rockslides discrete element simulation rock mass structure fragmentation laboratory experiments |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202107001 |
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