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

Author(s)
H. Han, H. M. An, H. Y. Liu, X. G. Wang, X. Zheng
Publisher
Elsevier
Source
Computers and Geotechnics
Keywords
Dynamic fracture, failure mechanismm fragment muck-piling, hybrid FEM-DEM, numerical method, rock blast
Year
2016

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 mechanismm fragment muck-piling.

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