Research on the Macro-Mesoscopic Response Mechanism of Multisphere Approximated Heteromorphic Tailing Particles
文献类型：期刊论文
| 作者 | Wang, Guangjin1,2,3; Zhao, Bing1,2; Wu, Bisheng3; Wang, Menglai4; Liu, Wenlian5; Zhou, Hanmin6; Zhang, Chao7; Wang, Yishu4; Han, Yabing6 |
| 刊名 | LITHOSPHERE
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 2022期号:-页码:- |
| ISSN号 | 1941-8264 |
| 英文摘要 | The shape of tailing particles is essential factors of their macroscopic mechanical properties. Scholars have studied the effects of controllable factors, such as loading method, confining pressure, and strain rate, on the strength of tailing sand. However, research on the tailing particle structure and shape through laboratory tests has proved to be difficult due to the uncertain and discrete tailing particle distribution. Thus, the macro-mesoscopic response of heteromorphic tailing particles is rarely investigated. In this paper, the macro-mesoscopic response of heteromorphic tailing particles is studied using multisphere approximation, and numerical simulation of triaxial tests on the particles is conducted. Nonlinear evolution patterns of porosity, internal friction angle, and cohesion of heteromorphic tailing particles with the variation of angularity were investigated using the flexible boundary program developed in this study, which revealed the intrinsic relationship between the mesostructure evolution mechanism and the macroscopic engineering characteristics of heteromorphic tailing particles. The research results showed that (1) changes in angularity led to tailing particle rearrangements and, in turn, porosity changes. With increased angularity and confining pressure, particle sphericity decreased, and the deviatoric and peak stress increased accordingly. In the meantime, the softening was more significant as the peak stress was exceeded, while the cohesive force generally increased. (2) With fixed particle shape and angularity, the internal friction angle decreased slightly as the effective confining pressure increased. (3) In the shearing process, the simulated contact force chain evolution of tailing particles with different shapes was similar. The disordered contact force chains gradually undergo directional connection, i.e., the increased confining pressure reduced the number of free tailing particles and increased the number of stressed particles. (4) The triaxial stress-strain and peak stress in rigid boundary simulations under different confining pressures were slightly lower than those in the flexible boundary simulations. However, the difference was insignificant, indicating the good feasibility and reasonability of rigid boundary simulations for the macroscopic mechanical behaviors in triaxial tests. The research results could offer more direct insights into the macro-mesoscopic response and mechanical mechanisms of nonspherical particles and provide references for the simulation of tailings at the microscopic levels. |
| 学科主题 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000844975300004 |
| 出版者 | GEOSCIENCEWORLD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35500]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China 2.Yunnan International Technology Transfer Center for Mineral Resources Development and Solid Waste Resource Utilization, Kunming 650093, China 3.State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China 4.National Engineering and Technology Research Center for Development & Utilization of Phosphate Resources, Kunming 650093, China 5.China Nonferrous Metals Industry Kunming Survey and Design Research Institute Co., Ltd., Kunming 650051, China 6.Beijing General Research Institute of Mining & Metallurgy, Beijing 100084, China 7.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Wang, Guangjin,Zhao, Bing,Wu, Bisheng,et al. Research on the Macro-Mesoscopic Response Mechanism of Multisphere Approximated Heteromorphic Tailing Particles[J]. LITHOSPHERE,2022,2022(-):-. |
| APA | Wang, Guangjin.,Zhao, Bing.,Wu, Bisheng.,Wang, Menglai.,Liu, Wenlian.,...&Han, Yabing.(2022).Research on the Macro-Mesoscopic Response Mechanism of Multisphere Approximated Heteromorphic Tailing Particles.LITHOSPHERE,2022(-),-. |
| MLA | Wang, Guangjin,et al."Research on the Macro-Mesoscopic Response Mechanism of Multisphere Approximated Heteromorphic Tailing Particles".LITHOSPHERE 2022.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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