Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill
Joint Authors
Feng, Yufan
Sun, Guanghua
Liang, Xuejian
Liu, Chenyang
Wang, Yue
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-11-10
Country of Publication
Egypt
No. of Pages
10
Abstract EN
To understand the mechanical properties of the backfill, to reveal the evolvement of micromechanical fissure of backfill, a uniaxial compression experiment was carried out for the full tailing cemented backfill.
After loading, the microstructure of the specimens was observed by microscope and the pore characteristic parameters were analyzed.
The results showed that the diameter of the initial damage hole of the backfill was mostly between 0 and 40 μm, the hole diameter increases gradually with the increase of pressure, and the hole diameter reached more than 5000 μm in the postpeak damage stage.
The upper structure of the backfill specimen is compact while the lower structure is relatively loose.
The cracks and interfaces between tailings particles and cement paste are mechanical weak surfaces, where the cracks are mainly generated and propagated.
The tip of microfractures in the backfill is damaged by the influence of stress concentration.
In the failure process, both surface porosity and fracture density decrease first and then increase, and the average pore diameter increases gradually.
The results have guiding significance for the study of backfill mechanical properties and goaf filling design.
American Psychological Association (APA)
Feng, Yufan& Sun, Guanghua& Liang, Xuejian& Liu, Chenyang& Wang, Yue. 2020. Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1129422
Modern Language Association (MLA)
Feng, Yufan…[et al.]. Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1129422
American Medical Association (AMA)
Feng, Yufan& Sun, Guanghua& Liang, Xuejian& Liu, Chenyang& Wang, Yue. Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1129422
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1129422