Crack evolution and strength deterioration of fine-grained tailings under dry and wet cycle
文献类型：期刊论文
| 作者 | Chen, Qinglin2,3; Bao, Lilin2,3; Zhang, Chao1; Li, Zugui2,3; Wang, Xiaojun2,3; Wang, Guangjin2,3 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2025-05-01 |
| 卷号 | 84期号:5页码:14 |
| 关键词 | Fine-grained tailings Dry and wet cycle Crack evolution Strength deterioration Safety factor |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-025-04231-0 |
| 英文摘要 | Affected by repeated tailings discharge and rainfall, tailings materials are constantly in a state of moisture absorption and desorption, which degrades mechanical properties of tailings. To investigate the evolution of cracks and the deterioration of strength in fine-grained tailings under dry-wet cycling conditions, direct shear tests and nuclear magnetic resonance (NMR) tests were conducted. The strength deterioration and pore structure characteristics of fine-grained tailings were analyzed. Using image processing technology, surface crack parameters of fine-grained tailings were extracted, and the crack evolution characteristics under dry-wet cycles were explored. The evolution of surface cracks can be divided into two stages: rapid crack development and steady crack development. In the rapid crack development stage, both the area and average width of the cracks decrease significantly, while the total length decreases slowly. In the steady crack development stage, the crack area and average crack width gradually decline, and the total crack length undergoes a pronounced reduction. The porosity of the tailings consistently increases due to the cycles. Cohesion and the internal friction angle of the tailings decrease exponentially with increasing porosity, and both also decrease as the number of dry-wet cycles increases. Consequently, the safety factor of the tailings dam gradually declines with increased cycling, leading to reduced dam stability and increased risk for safe operation. The research results provide certain guiding significance for the stability and long-term safe operation of tailings dams. |
| 资助项目 | National Natural Science Foundation of China[2023YFC3012200] ; National Key Research and Development Program of China[52104085] ; National Key Research and Development Program of China[52304155] ; National Natural Science Foundation of China[20232BAB213069] ; Jiangxi Provincial Natural Science Foundation Project[jxsq2023102139] ; Short-term Program of Jiangxi Province[2023ZDKJGG04] ; Yichun Science and Technology Plan Project |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001464939000005 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36270]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wang, Xiaojun |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.Jiangxi Prov Key Lab Safe & Efficient Min Rare Met, Ganzhou, Peoples R China 3.Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou 341000, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Qinglin,Bao, Lilin,Zhang, Chao,et al. Crack evolution and strength deterioration of fine-grained tailings under dry and wet cycle[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2025,84(5):14. |
| APA | Chen, Qinglin,Bao, Lilin,Zhang, Chao,Li, Zugui,Wang, Xiaojun,&Wang, Guangjin.(2025).Crack evolution and strength deterioration of fine-grained tailings under dry and wet cycle.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,84(5),14. |
| MLA | Chen, Qinglin,et al."Crack evolution and strength deterioration of fine-grained tailings under dry and wet cycle".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 84.5(2025):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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