Cemented paste backfill (CPB) has been one of the best practical approaches for tailings management and underground goaf treat-ment. Paste rheology is a science to study the flow and deformation behaviors of paste or filling body under the effects of stress, strain, temper-ature, and time during the CPB process. The goal of studying paste rheology is to solve the engineering problems existing in four key pro-cesses; that is, paste rheology should meet the engineering demands of thickening, mixing, transportation, and backfilling. However, paste rhe-ology is extremely complicated due to its high concentration, materials complexity, and engineering characteristics of non-stratification, non-segregation, and non-bleeding. The rheological behavior of full tailings in deep thickening, rheological behavior of paste in mixing and pipeline transportation, and rheological behavior of filling body are introduced and discussed: (1) gel point, compressive yield stress, and the hindered settling function are adopted to characterize the rheological properties of full tailings in deep thickening. Combination of Coe–Clevenger the-ory and Buscall–White theory can also analyze the thickening performance in the whole area of deep cone thickener; (2) yield stress and vis-cosity are consistent with the evolution trend of the relative structure coefficient of paste in mixing; (3) coupling effect of wall slip and time–temperature dependency has a significant influence on the rheological properties and pipeline transportation; (4) damage variable is intro-duced to the Burgers model to describe the creep damage of the filling body. However, in-depth and systematic studies were still needed to es-tablish a complete theoretical system of paste rheology in metal mines.

Aixiang Wu;Zhuen Ruan;Jiandong Wang

Key Laboratory of High-Efficient Mining and Safety of Metal Mines of the Ministry of Education,University of Science and Technology Beijing,Beijing100083,China;Shunde Graduate School of University of Science and Technology Beijing,Foshan 528399,China;School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China

矿物冶金与材料学报

[1]Aixiang Wu;Zhuen Ruan;Jiandong Wang-.Rheological behavior of paste in metal mines)[J].矿物冶金与材料学报,2022(04):717-726

rhe,Coe,Buscall,thickener

Rheological,paste,metal,mines,Cemented,CPB,has,been,best,practical,approaches,tailings,management,underground,goaf,treat,Paste,rheology,science,flow,deformation,behaviors,body,effects,stress,strain,during,process,goal,studying,solve,engineering,problems,existing,four,key,cesses,that,should,meet,demands,thickening,mixing,transportation,backfilling,However,extremely,complicated,due,its,high,concentration,materials,complexity,characteristics,stratification,segregation,bleeding,rheological,full,deep,pipeline,introduced,discussed,gel,point,compressive,yield,hindered,settling,function,adopted,characterize,properties,Combination,Clevenger,White,theory,also,analyze,performance,whole,area,cone,vis,cosity,consistent,evolution,trend,relative,structure,coefficient,coupling,wall,slip,temperature,dependency,significant,influence,damage,variable,Burgers,model,describe,creep,depth,systematic,studies,were,still,needed,tablish,complete,theoretical

0.490701