河南理工大学学报（自然科学版）2025，Vol.44Issue(6)：55-63,9.DOI:10.16186/j.cnki.1673-9787.2025030076
充填料浆泌水特性与水分迁移机理研究
Bleeding characteristics and water migration mechanism of backfill slurry
摘要
Abstract
Objectives This study aims to elucidate the correlation mechanism between the bleeding charac-teristics of backfill slurry and mesoscopic water migration,and to reveal the influence of macro-meso struc-tural evolution on the bleeding process.Methods An orthogonal experimental design was conducted to test fluidity,bleeding rate,and settling rate.Range analysis and efficacy coefficient calculations were com-bined with a Matlab-based 3D visualization multi-factor coupling model to determine the optimal mix ratio.Nuclear magnetic resonance(NMR)was used to analyze the mesoscopic water migration characteristics of the optimal slurry at standing times of 5,30,60,90,120,and 180 minutes.Results The optimal mix ra-tio was identified as a cement-tailings ratio of 1:8,a mass concentration of 74%,and a water-reducer dos-age of 1%.The significance order of factors affecting bleeding rate was:mass concentration>cement-tailings ratio>water-reducer dosage.NMR results indicated that in high-solid-concentration backfill slurry,adsorbed water was the dominant form;pore water acted as a dynamic transitional state,with fluctuating peak areas reflecting the balance between adsorbed water release and interfacial re-adsorption;and free wa-ter increased with prolonged standing time.Conclusions The bleeding process of backfill slurry can be di-vided into four distinct stages:induction period,acceleration period,constant period,and stabilization pe-riod.Water migration follows the pathway of adsorbed water→pore water→free water.The migration rate is slowest during the induction period,peaks in the acceleration period as adsorbed water rapidly converts to free water,remains rapid in the constant period,and becomes restrained in the stabilization period,result-ing in a steady bleeding state.This study provides insight into the mechanism linking bleeding characteris-tics to mesoscopic water migration and provides a theoretical basis for optimizing backfill parameters in deep mining.关键词
尾矿库/多目标优化/料浆泌水/水分迁移/细观演变Key words
tailings pond/multi-objective optimization/slurry bleeding/water migration/mesoscopic evolu-tion分类
矿业与冶金引用本文复制引用
杨柳华,王永彬,付搏涛,付士根,李振涛,龚剑..充填料浆泌水特性与水分迁移机理研究[J].河南理工大学学报（自然科学版）,2025,44(6):55-63,9.基金项目
国家重点研发计划项目(2023YFC3012200) （2023YFC3012200）
河南省自然科学基金项目(252300420040) （252300420040）
