Fracture propagation mode of coal under indirect tensile stresses
Paper
Paper/Presentation Title | Fracture propagation mode of coal under indirect tensile stresses |
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Presentation Type | Paper |
Authors | Serati, Mehdi (Author), Roshan, Hamid (Author), Mirzaghorbanali, Ali (Author), Mahmoud, Mutaz El-Amin (Author) and Thejaswee, Valluru (Author) |
Editors | Aziz, Naj and Mirzaghorbanali, Ali |
Journal or Proceedings Title | Proceedings of the 2021 Resource Operators Conference |
Number of Pages | 6 |
Year | 2021 |
Place of Publication | Australia |
ISBN | 9781741283358 |
9781741283365 | |
Web Address (URL) of Paper | https://ro.uow.edu.au/coal/821/ |
Web Address (URL) of Conference Proceedings | https://ro.uow.edu.au/coal2021/ |
Conference/Event | 2021 Resource Operators Conference (ROC2021) |
Event Details | 2021 Resource Operators Conference (ROC2021) Event Date 10 to end of 12 Feb 2021 Event Location 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. |
Keywords | fracture pattern; coal; tensile stress |
ANZSRC Field of Research 2020 | 401902. Geomechanics and resources geotechnical engineering |
400502. Civil geotechnical engineering | |
401905. Mining engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
University of New South Wales | |
University of Southern Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q774v/fracture-propagation-mode-of-coal-under-indirect-tensile-stresses
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