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Numerical modelling on short delay blast-induced fragmentation and vibration
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5872-5173
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5165-4229
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
2018 (English)In: Blasting and Fragmentation, ISSN 1937-6359, Vol. 12, no 2, p. 105-116Article in journal (Refereed) Published
Abstract [en]

Blasting operations can fragment rock mass into smaller pieces and meanwhile induce vibration anddamage in remaining rock mass. A series of small-scale laboratory tests were carried out to investigatethe effects of short delay times on fragmentation. These tests were modeled using a coupledFEM-BPM-PBM model in the LS-DYNA code. In the model, the remaining rock is representedby a finite element model (FEM) and the rock to be blasted is represented by a bonded particlemodel (BPM). The detonation of explosives is described with a particle blast method (PBM). Thefragment size distribution was obtained with a code developed in Perl programming language. Theblast-induced vibration and damage in the remaining rock mass were evaluated. The results showthat the coupled FEM-BPM-PBM model can be employed to evaluate both fragmentation in theblasted domain and the blast-induced damage and vibration in the remaining rock mass.

Place, publisher, year, edition, pages
Cleveland: International Society of Explosives Engineers , 2018. Vol. 12, no 2, p. 105-116
Keywords [en]
blasting, short delay, fragmentation, vibration, numerical modelling
National Category
Geotechnical Engineering
Research subject
Mining and Rock Engineering; Centre - Swedish Blasting Research Centre (SWEBREC)
Identifiers
URN: urn:nbn:se:ltu:diva-73819OAI: oai:DiVA.org:ltu-73819DiVA, id: diva2:1313206
Note

Validerad;2019;Nivå 1;2019-07-05 (johcin)

Available from: 2019-05-02 Created: 2019-05-02 Last updated: 2019-07-05Bibliographically approved

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Yi, ChangpingJohansson, DanielNyberg, Ulf

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