Next Article in Journal
Measuring Transport Time of Mine Equipment in an Underground Mine Using a Bluetooth Beacon System
Previous Article in Journal
Mineralogical Composition of Urinary Stones and Their Frequency in Patients: Relationship to Gender and Age
Article Menu

Export Article

Open AccessArticle
Minerals 2016, 6(4), 132; https://doi.org/10.3390/min6040132

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

1
School of Resources and Safety Engineering, Central South University, Changsha 410083, China
2
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
Received: 9 October 2016 / Revised: 21 November 2016 / Accepted: 12 December 2016 / Published: 16 December 2016
View Full-Text   |   Download PDF [1872 KB, uploaded 16 December 2016]   |  

Abstract

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
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

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

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top