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Hybrid finite-discrete element modelling of dynamic fracture and resultant fragment casting and muck-piling by rock blast
Institution:1. School of Engineering and ICT, University of Tasmania, TAS 7001, Australia;2. School of Civil & Environmental Engineering, University of Science and Technology Beijing, China;3. School of Resources and Civil Engineering, Northeastern University, Liaoning, China;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China;1. Lyles School of Civil Engineering, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, United States;2. Department of Civil Engineering, Lebanese American University, Lebanon;3. Department of Civil and Environmental Engineering, University of Cyprus, Cyprus;1. Western Australian School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Locked bag 30, Kalgoorlie, WA 6430, Australia;2. BLAST-BOSS Pty Ltd, Australia;3. Department of Energy and Resources Engineering, Chonnam National University, South Korea;4. Proof Engineers Pty Ltd, Australia;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. School of Civil Engineering, Wuhan University, Wuhan 430072, China;3. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;1. School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;2. State Key Laboratory for Geomechanics and Deep Underground Engineering, Beijing 100083, China
Abstract:A state-of-the-art review is conducted to highlight the fracture mechanism in rock blast and advantages and limitations of various methods in modelling it. A hybrid finite-discrete element method (FEM-DEM) is implemented to simulate rock fracture and resultant fragment muck-piling in various blasting scenarios. The modelled crushed, cracked and long radial crack zones are compared with those in literatures to calibrate the hybrid FEM-DEM. Moreover, the hybrid modelling reproduces the rock fragmentation process during blasting. It is concluded that the hybrid FEM-DEM is superior to continuous and discontinuous methods in terms of modelling dynamic fracture of rock under blast-induced impact load.
Keywords:Hybrid FEM-DEM  Dynamic fracture  Rock blast  Numerical method  Failure mechanism  Fragment muck-piling
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