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Cemented Backfilling Technology of Paste-Like Based on Aeolian Sand and Tailings

School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Key Laboratory of Mineral Resources Exploitation and Hazard Control for Deep Metal Mines, Changsha 410083, China
Author to whom correspondence should be addressed.
Academic Editors: Kota Hanumantha Rao and Abbas Taheri
Minerals 2016, 6(4), 132;
Received: 9 October 2016 / Revised: 21 November 2016 / Accepted: 12 December 2016 / Published: 16 December 2016
PDF [1872 KB, uploaded 16 December 2016]


Aeolian sand, tailings, and #32.5 Portland cement were used to produce backfilling aggregate, and physicochemical evaluations and proportioning tests were conducted. It is revealed that a mixture of aeolian sand and tailings can be used as a backfilling aggregate for the complementarities of their physicochemical properties; e.g., high Al2O3 content in the aeolian sand and CaO content in the tailings, coarse particles of aeolian sand and fine particles of tailings, etc. In addition, the optimal backfilling aggregate was shown to have a mass fraction of 72%–74%, a cement–sand ratio of 1:8, and an aeolian sand proportion of 25%. Furthermore, viscometer tests were used to analyze the rheological characteristics, and the slurry in these optimized proportions exhibited shear thinning phenomena with an initial yield stress, which belongs to paste-like—a cemented backfilling slurry with a higher mass fraction than a two-phase flow and better flowability than a paste slurry. Finally, the application of this backfilling technology shows that it can not only realize safe mining, but also bring huge economic benefits, and has some constructive guidance for environmental protection. View Full-Text
Keywords: aeolian sand; tailings; backfilling; proportioning tests; rheological characteristics aeolian sand; tailings; backfilling; proportioning tests; rheological characteristics

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Zhang, Q.; Chen, Q.; Wang, X. Cemented Backfilling Technology of Paste-Like Based on Aeolian Sand and Tailings. Minerals 2016, 6, 132.

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