Crack damage evolution in coal at elevated temperatures

Serati, Mehdi and Kwan, King Ho Benny and Gordon, Nick and Moravej, Sasan and Bahaaddini, Mojtaba and Mirzaghorbanali, Ali ORCID: https://orcid.org/0000-0002-7967-9233 (2022) Crack damage evolution in coal at elevated temperatures. In: 2022 Resource Operators' Conference, Feb 2022, University of Wollongong / University of Southern Queensland, Australia.


Abstract

This work studies the behaviour of coal samples at various thermal environments from sub-zero temperatures of -100 to 300°C by monitoring their fracture speed, ultimate strength, and crack damage evolution mode. High-speed recordings captured at 140,000 frames per second identified three
different fracture evolution modes as a function of the applied ambient temperature. As the temperature increases, the fracture behaviour was observed to be through intact rock bridges resulting in reduced crack speeds and smaller fragments. Interestingly, at sub-zero temperatures, a different failure pattern was observed through the formation of a single fracture plane resulting in larger fragments with sharper edges.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Date Deposited: 19 Apr 2022 02:51
Last Modified: 09 May 2022 04:43
Uncontrolled Keywords: coal; thermal environments; fracture evolution
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401902 Geomechanics and resources geotechnical engineering
40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401905 Mining engineering
URI: http://eprints.usq.edu.au/id/eprint/47573

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