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Numerical modelling for blast-induced fragmentation in sublevel caving mines
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5872-5173
Itasca Consultants AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5165-4229
2017 (English)In: Tunnelling and Underground Space Technology, ISSN 0886-7798, E-ISSN 1878-4364, Vol. 68, p. 167-173Article in journal (Refereed) Published
Abstract [en]

The flow behavior of the ore and waste significantly affect the dilution in sublevel caving (SLC) mines. Drill and blast issues are identified as having a substantial impact upon SLC material flow. In the paper, blast-induced fragmentation in SLC was numerically investigated using the LS-DYNA code. A method was presented to evaluate fragmentation based on the damage description and a fragment identification routine implemented in the LS-PREPOST (a pre- and post-processing tool of LS-DYNA). The effects of the delay time and the primer position on fragmentation were investigated. The results indicated that a long delay time gives a finer fragmentation for the cases discussed in the paper. The results also showed that the middle primer and the top primer in SLC can give a fine fragmentation. The limitations of numerical modelling were also discussed.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 68, p. 167-173
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-63721DOI: 10.1016/j.tust.2017.05.030ISI: 000406988300015Scopus ID: 2-s2.0-85019988601OAI: oai:DiVA.org:ltu-63721DiVA, id: diva2:1105605
Note

Validerad;2017;Nivå 2;2017-06-05 (andbra)

Available from: 2017-06-05 Created: 2017-06-05 Last updated: 2018-07-10Bibliographically approved

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Yi, ChangpingJohansson, Daniel

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