Numerical investigation into the blasting-induced damage characteristics of rocks considering the role of in-situ stresses and discontinuity persistence

Jayasinghe, Laddu Bhagya; Shang, J.; Zhao, Z.; Goh, A. T. C.

doi:10.1016/j.compgeo.2019.103207

Reference : Numerical investigation into the blasting-induced damage characteristics of rocks con...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/10993/44481

Title :	Numerical investigation into the blasting-induced damage characteristics of rocks considering the role of in-situ stresses and discontinuity persistence
Language :	English
Author, co-author :	Jayasinghe, Laddu Bhagya [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit]
	Shang, J. [Nanyang Centre for Underground Space, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore]
	Zhao, Z. [Nanyang Centre for Underground Space, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore]
	Goh, A. T. C. [Nanyang Centre for Underground Space, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore]
Publication date :	2019
Journal title :	Computers and Geotechnics
Publisher :	Elsevier Ltd
Volume :	116
Peer reviewed :	Yes
Audience :	International
ISSN :	0266352X
Keywords :	[en] Blasting ; Discontinuity persistence ; In-situ stress ; RHT model ; Rock damage ; Cracks ; Fracture ; Hydrodynamics ; Rocks ; Stresses ; Finite element method model (FEM) ; High in situ stress ; High stress concentration ; Insitu stress ; Numerical investigations ; Smoothed particle hydrodynamics
Abstract :	[en] This paper presents a 3D coupled Smoothed Particle Hydrodynamics (SPH) and Finite Element Method (FEM) model, which was developed to investigate the extent of damage zone and fracture patterns in rock due to blasting. The RHT material model was used to simulate the blasting-induced damage in rock. The effects of discontinuity persistence and high in-situ stresses on the evolution of blasting-induced damage were investigated. Results of this study indicate that discontinuity persistence and spatial distribution of rock bridges have a significant influence on the evolution of blasting-induced damage. Furthermore, high in-situ stresses also have a significant influence on the propagation of blasting-induced fractures, as well as the patterns of fracture networks. It is also shown that the blasting-induced cracks are often induced along the direction of the applied high initial stresses. Moreover, additional cracks are normally generated at the edges of the rock bridges probably due to the relatively high stress concentration. � 2019 Elsevier Ltd
Permalink :	http://hdl.handle.net/10993/44481
DOI :	10.1016/j.compgeo.2019.103207

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