Fragmentation Characteristic and Energy Dissipation of Coal under Impact Load
Publication: International Journal of Geomechanics
Volume 21, Issue 5
Abstract
The catastrophic failure of coal under super-critical stresses and mining-induced disturbance is becoming one of major safety risks of underground mining. Research of the failure pattern of coal under impact load is helpful for understanding its burst behavior in order to mitigate the burst risk. To investigate the fragmentation characteristic and burst behavior of coal under impact load, drop weight tests of coal samples were conducted. This paper found that coal samples have high peak stress, pulverized fragmentation, and intensive burst energy under impact load. The fragments induced by the impact load have a relatively consistent distribution mode, which can be characterized by a fractal model. The burst energy accounts for more than 99% of the impact energy input while fragmentation energy only accounts for no more than 1%.
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Acknowledgments
The authors sincerely acknowledge Mr. Duncan Best and Mr. Travis Marshall for their support during the experimental process. The first author would like to express sincere appreciation for the scholarship provided by the China Scholarship Council (201606420052). This research is funded by the Australian Research Council Industrial Transformation Research Hub for Nanoscience-based Construction Material Manufacturing (IH150100006) and the State Key Laboratory of Coal Mine Disaster Dynamics and Control, CQU (2011DA105287—FW201804). Author contributions: Xiaohan Yang: methodology; formal analysis; writing–original draft. Ting Ren: supervision; funding acquisition. Lihai Tan: validation; experimental. Alex Remennikov: supervision; writing–review and editing.
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Published In
International Journal of Geomechanics
Volume 21 • Issue 5 • May 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: May 19, 2020
Accepted: Dec 11, 2020
Published online: Mar 5, 2021
Published in print: May 1, 2021
Discussion open until: Aug 5, 2021
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