University Of Tasmania

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

conference contribution
posted on 2023-05-23, 09:31 authored by An, HM, Hongyuan LiuHongyuan Liu
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.


University of Tasmania


Publication title

Proceedings of the 8th Asian Rock Mechanics Symposium


N Shimizu, K Kaneko, J Kodama






School of Engineering


Japanese Committee for Rock Mechanics C/O The Japanese Geotechnical Society

Place of publication


Event title

8th Annual Asian Rock Symposium Rock Mechanics for Global Issues - Natural Disasters, Environment and Energy

Event Venue

Sapporo, Japan

Date of Event (Start Date)


Date of Event (End Date)


Rights statement

Copyright unknown

Repository Status

  • Restricted

Socio-economic Objectives

Civil construction processes