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A common form for fragment size distributions from blasting and a derivation of a generalized Kuznetsov's x50-equation
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
2009 (English)In: Rock Fragmentation by Blasting: Proceedings of the 9th International Symposium on Rock Fragmentation by Blasting - Fragblast 9, Sept. 2009, Granada Spain / [ed] José A. Sanchidrián Blanco, Boca raton, Fla.: CRC Press, 2009, p. 199-208Conference paper, Published paper (Refereed)
Abstract [en]

A common form for fragment size distributions from blasting is derived from dimensional analysis. When gravity is neglected and the fragment shape is constant, one dimensionless parameter, Π s, remains. If the size distribution uses the quantities x/x max and x 50/x max the dependence on Π s becomes implicit. The Swebrec function has this preferred form. Π s depends essentially on specific charge, explosive energy, burden and rock strength and in a way, which reminds of the x 50-prediction equation of the Kuz-Ram model. A generalization of the x 50-equation is derived, which depends on whether the blasting is 2D or 3D, on the type of loading and on the material model. Test blast results are used to make the appropriate choice. One consequence is that the q-dependence of the x 50-equation changes with the way in which the blasting is done. Another is that the dependence of the Kuz-Ram uniformity index n on geometry only is questionable

Place, publisher, year, edition, pages
Boca raton, Fla.: CRC Press, 2009. p. 199-208
Keywords [en]
Civil engineering and architecture - Geoengineering and mining engineering
Keywords [sv]
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-31832Local ID: 62053990-ab70-11de-8293-000ea68e967bISBN: 978-0-415-48296-7 (print)OAI: oai:DiVA.org:ltu-31832DiVA, id: diva2:1005066
Conference
International Symposium on Rock Fragmentation by Blasting : 13/09/2009 - 17/09/2009
Note
Godkänd; 2009; 20090927 (finn)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Ouchterlony, Finn

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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Language
  • de-DE
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  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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