Next Article in Journal
Technique, Creativity, and Sustainability of Bamboo Craft Courses: Teaching Educational Practices for Sustainable Development
Previous Article in Journal
Do Transformational Leaders Engage Employees in Sustainable Innovative Work Behaviour? Perspective from a Developing Country
Article Menu
Issue 9 (May-1) cover image

Export Article

Open AccessArticle

Experimental Research on Heat Transfer and Strength Analysis of Backfill with Ice Grains in Deep Mines

1,2, 1, 1,2,* and 1,2,*
1
Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
2
Key Laboratory of Western Mines and Hazards Prevention, Ministry of Education of China, Xi’an 710054, China
*
Authors to whom correspondence should be addressed.
Sustainability 2019, 11(9), 2486; https://doi.org/10.3390/su11092486
Received: 17 April 2019 / Accepted: 24 April 2019 / Published: 28 April 2019
(This article belongs to the Section Energy Sustainability)
  |  
PDF [2692 KB, uploaded 28 April 2019]
  |  

Abstract

In deep mines, two urgent problems are a high temperature thermal environment and solid waste. Filling the goaf with slurry mixed with ice grains is an effective way to solve these two problems simultaneously. The thermal property and mechanical property of the ice-added backfill have a great influence on the cooling effect in the deep mine. In this study, an experimental facility for measuring the temperature distribution of ice-added backfill slurry was established, and the temperature of backfill slurry with different proportions was measured. Then, the thermal properties of temperature distribution and cooling capacity and the mechanical property of uniaxial compressive strength of the backfill specimens were analyzed, and the results indicated the following: firstly, the cooling capacity of ice-added backfill specimens is negatively related with the slurry concentration C and is positively related with the ice-water ratio Ω; secondly, the strength of backfill specimens is affected by the slurry concentration C and ice-water ratio Ω by a contrary law compared to the cooling capacity; thirdly, ice-added backfill slurry with an ice-water ratio Ω of 1:1 has the best mechanical property after solidification. The effects of the slurry concentration and ice-water ratio on the thermal and mechanical properties were analyzed, and the results indicated that the optimum proportion of ice-added backfill slurry is a slurry concentration of 74% and an ice-water ratio of 1:1 in the present research range. This study is significant for the deep mine cooling method with ice-added backfill. View Full-Text
Keywords: ice-added backfill slurry; ice-water ratio; slurry concentration; cooling capacity; uniaxial compressive strength ice-added backfill slurry; ice-water ratio; slurry concentration; cooling capacity; uniaxial compressive strength
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, X.; Jia, Y.; Wang, M.; Liu, L. Experimental Research on Heat Transfer and Strength Analysis of Backfill with Ice Grains in Deep Mines. Sustainability 2019, 11, 2486.

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]
Sustainability EISSN 2071-1050 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top