Fracture propagation mode of coal under indirect tensile stresses

Serati, Mehdi and Roshan, Hamid and Mirzaghorbanali, Ali ORCID: https://orcid.org/0000-0002-7967-9233 and Mahmoud, Mutaz El-Amin and Thejaswee, Valluru (2021) Fracture propagation mode of coal under indirect tensile stresses. In: 2021 Resource Operators' Conference, 10 Feb - 12 Feb 2021, Springfield, Australia.


Abstract

This work presents the results of an investigation on the study of fracture pattern in coal under induced tensile stresses using image processing techniques. Several high-speed recordings captured at 5 kHz and above were examined, and three distinct fracture propagation modes were identified. As the coal tensile strength increases, the fracture behaviour was observed to be a spalling-like rupture in the form of a dominant tensile crack accompanied with multiple large secondary shear fractures that break the test specimen apart into several pieces. Combined localised tensile and shear cracks at intact rock bridges within a coal Brazilian sample (with pre-existing defects) was also observed, indicating a very different failure pattern from that in standard recommendations.


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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: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Date Deposited: 21 Jul 2022 23:25
Last Modified: 31 Aug 2022 02:32
Uncontrolled Keywords: fracture pattern; coal; tensile stress
Fields of Research (2020): 40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401902 Geomechanics and resources geotechnical engineering
40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401905 Mining engineering
URI: http://eprints.usq.edu.au/id/eprint/49374

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