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Hybrid finite-discrete element modelling of dynamic fracture of rock and resultant fragment arching by rock blast

Citation

An, HM and Liu, HY, Hybrid finite-discrete element modelling of dynamic fracture of rock and resultant fragment arching by rock blast, Proceedings of the 8th Asian Rock Mechanics Symposium, 14-16 October 2014, Sapporo, Japan, pp. 701-707. ISBN 978-4-907430-03-0 (2014) [Refereed Conference Paper]


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Official URL: http://www.rocknet-japan.org/ARMS8/program-program...

Abstract

A hybrid finite-discrete element method is introduced to simulate dynamic fracture of rock and resultant fragment arching caused by rock blast. Three typical examples, i.e. blast in a rock mass with a single borehole and a free surface, simultaneous blast, and consecutive blast with various delay times, are modelled and the obtained stress wave propagation, fracture process and resultant fragment movement are compared with those well documented in literatures. It is found that the hybrid finite-discrete element method reproduces the dynamic fracture of rock in rock blast from the stress wave propagation to the formations of crushed zone and cracked zone around the boreholes, the propagation of long radial cracks resulting in rock fracture, the casting of resultant fragments into air, and the fragment arching. It is concluded that the hybrid finite-discrete element method is a valuable numerical tool for the study on rock blast and a more advanced numerical method compared with the finite element method or discrete element method in terms of modelling dynamic fracture of rock.

Item Details

Item Type:Refereed Conference Paper
Keywords:hybrid FEM/DEM, rock blast, dynamic fracture, stress wave, fragment arching
Research Division:Engineering
Research Group:Resources Engineering and Extractive Metallurgy
Research Field:Geomechanics and Resources Geotechnical Engineering
Objective Division:Construction
Objective Group:Construction Processes
Objective Field:Civil Construction Processes
Author:An, HM (Mr Huaming An)
Author:Liu, HY (Dr Hong Liu)
ID Code:96828
Year Published:2014
Deposited By:Engineering
Deposited On:2014-11-21
Last Modified:2016-04-27
Downloads:0

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