Hybrid finite-discrete element modelling of dynamic fracture and resultant fragment casting and muck-piling by rock blast

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• 作者：H.M. An^a ; ^b ; H.Y. Liu^a ; ^{Hong.Liu@utas.edu.au" class="auth_mail" title="E-mail the corresponding author} ; Haoyu Han^a ; Xin Zheng^a ; ^c ; X.G. Wang^b
• 关键词：Hybrid FEM-DEM ; Dynamic fracture ; Rock blast ; Numerical method ; Failure mechanism ; Fragment muck-piling
• 刊名：Computers and Geotechnics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：81
• 期：Complete
• 页码：322-345
• 全文大小：5440 K

文摘

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.