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Fragmentation under different confinement conditions and the burden behaviour: small scale tests
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0001-8564-3694
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.
2012 (English)In: Measurement and Analysis of Blast Fragmentation: Workshop Hosted by FRAGBLAST 10 - The 10th International Symposium on Rock Fragmentation by Blasting / [ed] Jose A. Sanchidrian Blanco; Ashok Kumar Singh, Boca Raton, Fla.: CRC Press/Balkema , 2012, p. 61-70Conference paper, Published paper (Refereed)
Abstract [en]

Small scale-tests have been performed on magnetic mortar blocks to investigate the influence of delay times, specific charge and firing pattern on fragmentation both when the burden is free and when confined by debris simulating the confined conditions of a SLC-blast ring and to study the burden behavior during blasting by implementing dynamic methods of measurements. The dimensions of the test blocks were 660 ×270 ×210 mm (L ×W ×H). Two different blast hole patterns, 2 rows with 5 holes with a burden of 70 mm (S/B ×1.6) and 3 rows with 7 holes with a burden of 58.3 mm (S/B ×1.4). A complete analysis regarding the influence of different delay times ranging from 0 to 4.1 ms/m of burden, different specific charges and different firing patterns on fragmentation has been made, based upon 22 blocks.

Place, publisher, year, edition, pages
Boca Raton, Fla.: CRC Press/Balkema , 2012. p. 61-70
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-31539Local ID: 5c14b04f-15e8-4dc2-8076-0961872e086eISBN: 978-0-415-62140-3 (print)ISBN: 978-0-203-38753-5 (electronic)OAI: oai:DiVA.org:ltu-31539DiVA, id: diva2:1004773
Conference
International Symposium on Rock Fragmentation by Blasting : 24/11/2012 - 29/11/2012
Note
Godkänd; 2012; 20121203 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-04-16Bibliographically approved

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Petropoulos, NikolaosJohansson, DanielOuchterlony, Finn

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