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Improved blasting performance through precise initiation
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: 0000-0002-8024-435X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5165-4229
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2013 (English)In: EFEE-7th World Conference on Explosives & Blasting, Moscow: European Federation of Explosives Engineers , 2013, Vol. 1, p. 20-26Conference paper, Published paper (Refereed)
Abstract [en]

Blast-induced fragmentation is an important factor in optimization of downstream processes in a mine. Several researchers believe that the fragmentation can be improved by means of precise short inter-hole delay times. Six full-scale trials with different inter-hole delay times of 1, 3, 6 and 42 ms (0.14, 0.42, 0.84 and 6 ms/m of burden, respectively) were conducted in Boliden Aitik open pit copper mine in Sweden. Electronic detonators were used for short inter-hole delay times, which correspond to different wave interactions between the neighboring blast holes. All the trials were carried out in more or less similar geological conditions. MWD data, swelling, fragmentation and crusher efficiency have been evaluated in the trials. Based on these trials, the short inter-hole delay times did not have a significant effect on fragmentation, swelling and crushability. However, a reduced number of boulders was observed for short delays, suggesting that the coarse region of the distribution curve was influenced rather than the fine part of it.

Place, publisher, year, edition, pages
Moscow: European Federation of Explosives Engineers , 2013. Vol. 1, p. 20-26
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-27783Local ID: 1519210c-845a-40a9-a5ab-a58468a95ffbISBN: 978-5-98746-016-0 (print)OAI: oai:DiVA.org:ltu-27783DiVA, id: diva2:1000973
Conference
World conference on Explosives & Blasting : 15/09/2013 - 17/09/2013
Note
Godkänd; 2013; 20130529 (nikpet)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-05-28Bibliographically approved

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Petropoulos, NikolaosBeyglou, AliJohansson, DanielNovikov, EvgenyNyberg, Ulf

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