1.昆明理工大学 国土资源工程学院，昆明 650093;2.云南省矿产资源开发与固废资源利用国际技术转移中心，昆明 650093;3.江西理工大学 安全工程系，南昌 330013;4.云南磷化集团有限公司， 昆明 650600;5.中国有色金属工业昆明勘察设计研究院有限公司，昆明 650051
张雕（1997—），男，硕士研究生，主要研究方向为地质灾害工程，（E-mail）1066651240@qq.com。
王光进，男，教授，博士生导师，主要从事矿山岩土边坡灾害预警研究，（E-mail）wangguangjin2005@163.com。
国家自然科学基金面上项目（52174114）；国家磷资源开发利用工程技术研究中心开放基金（NECP2022-07）。
1.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).
排放后的尾矿沉积规律影响尾矿库坝体的稳定性。为研究不同排浆浓度条件下尾矿沉积特性，以云南某尾矿库为研究对象，通过现场试验和室内缩尺的堆坝模型试验，研究了不同排浆浓度下的尾矿沉积规律，分析了单颗尾砂颗粒的临界状态，推导了尾砂颗粒运动—沉积临界速度关系和不同粒径颗粒在干滩上的运移距离公式。研究结果表明：沉积滩面的坝前位置粗尾砂沉积较多，随着距离子坝越远，细粒尾砂沉积越多；在干滩面上尾砂流速与矿浆浓度呈负相关，与尾砂浆体压力呈正相关；较粘稠高浓度尾砂浆体的浓度越大，流动力就越弱，致使沉积形成的坡度越大；排浆浓度的逐渐增大，矿浆沉积长度也随之变长；尾砂颗粒在干滩面的沉积距离与排浆初始速度成正比，与干滩坡度、排浆浓度及颗粒粒径成反比。研究成果可对尾矿库坝体稳定性分析提供一定参考。
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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