Rheological properties of a multiscale granular system during mixing of cemented paste backfill:A review  

作　　者：Cuiping Li Xue Li Zhu’en Ruan 

机构地区：[1]Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines,University of Science and Technology Beijing,Beijing,100083,China [2]Shunde Innovation School of University of Science and Technology Beijing,Foshan,528399,China [3]School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing,100083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2023年第8期1444-1454,共11页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Key R&D Program of China (No.2022YFC2903803);the National Natural Science Foundation of China (No.52130404);China Postdoctoral Science Foundation (No.2021M690011);Guangdong Basic and Applied Basic Research Foundation(No.2021A1515110161);Postdoctor Research Foundation of Shunde Graduate School of University of Science and Technology Beijing (No.2021BH011);the Fundamental Research Funds for the Central Universities (No.FRF-TP-22-112A1)

摘　　要：The technology of cemented paste backfill(CPB)is an effective method for green mining.In CPB,mixing is a vital process aiming to prepare a paste that meets the non-stratification,non-segregation,and non-bleeding requirements.As a multiscale granular system,homogenization is one of the challenges in the paste-mixing process.Due to the high shearing,high concentration,and multiscale characteristics,paste exhibits complex rheological properties in the mixing process.An overview of the mesomechanics and structural evolution is presented in this review.The effects of various influencing factors on the paste's rheological properties were investigated,and the rheological models of the paste were outlined from the macroscopic and mesoscopic levels.The results show that the mechanical effects and structural evolution are the fundamental factors affecting the rheological properties of the paste.Existing problems and future development trends are presented to change the practice where the CPB process comes first and the theory lags.

关 键 词：cemented paste backfill RHEOLOGY mixing process MESOMECHANICS structural evolution 

分 类 号：TD803[矿业工程—矿山开采]