河南理工大学学报（自然科学版）2025，Vol.44Issue(6)：1-8,8.DOI:10.16186/j.cnki.1673-9787.2025030077
固体质量分数对全尾砂固结特性影响机制研究
Influence of solid mass fraction on the consolidation characteristics of full tailings
摘要
Abstract
Objectives The influence of solids mass fraction on the consolidation behavior of unclassified,high-concentration tailings is investigated.Evolutionary patterns of pore water pressure and matric suction are revealed,and optimized engineering control strategies are proposed to enhance the stability of tailings dams.Methods Laboratory experiments were conducted to systematically examine the consolidation dynam-ics of high-concentration tailings with solids mass fractions of 60%～70%.Moisture sensors were used to track the three-stage spatiotemporal evolution of volumetric water content(VWC).Dynamic measurements of pore water pressure and matric suction were analyzed to assess seepage characteristics and consolidation processes across different Cs levels.Based on the experimental data,the coupling between particle-skeleton formation and water migration was examined,and engineering optimization strategies were proposed.Re-sults The solids mass fraction significantly affected the consolidation dynamics.Higher-Cs systems,due to stronger interparticle interactions,formed more stable particle skeletons,reduced seepage efficiency,and prolonged the dissipation time of excess pore water pressure.Pronounced spatial gradients in volumetric wa-ter content were observed,with a 6%difference between the upper and lower layers in the Cs=70%speci-mens.)Pore water pressure dissipation rates correlated positively with mass fraction,while the maximum matrix suction increased non-linearly from 59.12 kPa(Cs=60%)to 254.34 kPa(Cs=70%).The multistage consolidation response revealed the evolution of moisture-migration mechanisms,and the final VWC showed a significant negative correlation with the initial Cs.The solids mass fraction non-linearly regulates the consolidation behavior of high solids tailings by modulating seepage dynamics and unsaturated character-istics.Conclusions This study provides a theoretical basis for parameter optimization of high concentration discharge processes in tailings storage facilities(TSFs).Through the integration of intelligent monitoring systems with dynamic control strategies,the structural performance of the tailings dam can be effectively enhanced,thereby meeting the safety-management requirements of modern TSFs.关键词
尾矿库/排放/固结/基质吸力Key words
tailings dam/discharge/consolidation/matric suction分类
矿业与冶金引用本文复制引用
陈友良,张乳燕,付士根,阎露璐,王守印,李海港..固体质量分数对全尾砂固结特性影响机制研究[J].河南理工大学学报（自然科学版）,2025,44(6):1-8,8.基金项目
国家重点研发计划项目(2023YFC3012200) （2023YFC3012200）
