Document Type
Conference Paper
Publication Date
2022
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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Publication Details
Mehdi Serati, King Ho Benny Kwan, Nick Gordon, Sasan Moravej, Mojtaba Bahaaddini, Ali Mirzaghorbanali, Crack damage evolution in coal at elevated temperatures, Proceedings of the 2022 Resource Operators Conference, University of Wollongong - Mining Engineering, February 2022, University of Southern Queensland, 120-125.