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Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining
Joint Authors
Qi, Tingye
Feng, Guorui
Li, Yanrong
Guo, Yuxia
Guo, Jun
Zhang, Yujiang
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-05-21
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water.
In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d and 28 d curing times, respectively.
The test results indicate that the strengths of the CGB, regardless of the curing time, increased with fine gangue content changing from 20% up to 40%.
Further increase in fine gangue introduced a decrease in the strength.
Another observation is that, at 3 days, a general increasing trend of CGB resistivity was noted with fine gangue content.
At 28 days, the resistivity of CGB decreased with increase in the fine gangue content.
Correlations between the resistivity and compression strength of CGB show a concave pattern, which attribute to the various micromechanism influenced on the resistivity and strength of CGB with different fine gangue content.
It indicates that using resistivity to derive strength of CGB is not appropriate.
American Psychological Association (APA)
Qi, Tingye& Feng, Guorui& Li, Yanrong& Guo, Yuxia& Guo, Jun& Zhang, Yujiang. 2015. Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining. Shock and Vibration،Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1078331
Modern Language Association (MLA)
Qi, Tingye…[et al.]. Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining. Shock and Vibration No. 2015 (2015), pp.1-11.
https://search.emarefa.net/detail/BIM-1078331
American Medical Association (AMA)
Qi, Tingye& Feng, Guorui& Li, Yanrong& Guo, Yuxia& Guo, Jun& Zhang, Yujiang. Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining. Shock and Vibration. 2015. Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1078331
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1078331