Experimental Investigation on the Performance of Full Tailings Cemented Backfill Material in a Lead–Zinc Mine Based on Mechanical Testing
Ning Yang, Renze Ou, Ruosong Bu, Daoyuan Sun, Fang Yan, Hongwei Wang, Qi Liu, Mingdong Tang, Xiaohui Li
TL;DR
This study investigates how to optimize cemented tailings backfill material in a lead-zinc mine to improve strength and transportability.
Contribution
The study provides a quantitative framework for optimizing cemented tailings backfill mix proportions in high fine-grained full tailings.
Findings
Solids mass concentration above 68% improves transportability and reduces segregation.
Cement-to-tailings ratio and concentration strongly correlate with compressive strength.
42.5# cement offers better techno-economic performance for early strength and binder consumption.
Abstract
With the increasing requirements for “Green Mine” construction, Cemented Tailings Backfill (CTB) has emerged as the preferred strategy for solid waste management and ground pressure control in underground metal mines. However, full tailings, characterized by wide particle size distribution and high fine-grained content, exhibit complex physicochemical properties that lead to significant non-linear behavior in slurry rheology and strength evolution, posing challenges for accurate prediction using traditional empirical formulas. Addressing the issues of significant strength fluctuations and difficulties in mix proportion optimization in a specific lead–zinc mine, this study systematically conducted physicochemical characterizations, slurry sedimentation and transport performance evaluations, and mechanical strength tests. Through multi-factor coupling experiments, the synergistic effects…
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Taxonomy
TopicsTailings Management and Properties · Rock Mechanics and Modeling · Materials Engineering and Processing