ZHANG Diao
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. ChinaWANG Guangjin
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China;Yunnan International Technology Transfer Center for Mineral Resources Development and Solid Waste Resource Utilization, Kunming 650093, P. R. ChinaSHEN Yingming
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. ChinaDONG Zhicheng
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. ChinaLI Xiaoshuang
Department of Safety Engineering, Jiangxi University of Science and Technology, Nanchang 330013, P. R. ChinaLI Yaoji
Yunnan Phosphate Group Co., Ltd., Kunming 650600, P. R. ChinaSUI Sugang
China Nonferrous Metal Industry Kunming Survey Design Institute Co., Ltd., Kunming 650051, P. R. China1.Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China;2.Yunnan International Technology Transfer Center for Mineral Resources Development and Solid Waste Resource Utilization, Kunming 650093, P. R. China;3.Department of Safety Engineering, Jiangxi University of Science and Technology, Nanchang 330013, P. R. China;4.Yunnan Phosphate Group Co., Ltd., Kunming 650600, P. R. China;5.China Nonferrous Metal Industry Kunming Survey Design Institute Co., Ltd., Kunming 650051, P. R. China
Supported by National Natural Science Foundation of China (52174114), and the Open Foundation of the National Engineering Research Center for Phosphorus Resources Development and Utilization (NECP2022-07).
The deposition law of tailings after discharge affects the stability of tailings dam. In order to study the characteristics of tailings deposition under different slurry discharge concentrations, this paper takes a tailings pond in Yunnan as the research object, and studies the tailings deposition law under different slurry discharge concentrations through field tests and indoor scale dam model tests. The critical state of single tailings particles is analyzed, and the relationship between the movement-deposition critical velocity of tailings particles and the migration distance formula of particles with different particle sizes on dry beaches are derived. The results show that there are more coarse tailings in the front of the dam of the sedimentary beach, and the farther away from the sub-dam, the more fine-grained tailings are deposited. The tailings flow velocity on the dry beach surface is negatively correlated with the slurry concentration and positively correlated with the tailings mortar pressure. The greater the concentration of the viscous high concentration tailings mortar, the weaker the flow force, and the greater the slope formed by the deposition; with the increase of slurry concentration, the deposition length of slurry also increases. The deposition distance of tailings particles on the dry beach surface is proportional to the initial velocity of slurry discharge, and inversely proportional to the dry beach slope, slurry discharge concentration and particle size. The research results can provide some reference for the stability analysis of tailings dam.
张雕,王光进,莘英铭,董致成,李小双,李耀基,眭素刚.不同排浆浓度下的尾矿沉积规律研究[J].重庆大学学报,2023,46(8):68~77
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