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Improved blasting performance through precise initiation
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0001-8564-3694
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0002-8024-435X
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0002-5165-4229
Vise andre og tillknytning
2013 (engelsk)Inngår i: EFEE-7th World Conference on Explosives & Blasting, Moscow: European Federation of Explosives Engineers , 2013, Vol. 1, s. 20-26Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
Moscow: European Federation of Explosives Engineers , 2013. Vol. 1, s. 20-26
HSV kategori
Forskningsprogram
Gruv- och Berganläggningsteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-27783Lokal ID: 1519210c-845a-40a9-a5ab-a58468a95ffbISBN: 978-5-98746-016-0 (tryckt)OAI: oai:DiVA.org:ltu-27783DiVA, id: diva2:1000973
Konferanse
World conference on Explosives & Blasting : 15/09/2013 - 17/09/2013
Merknad
Godkänd; 2013; 20130529 (nikpet)Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2018-05-28bibliografisk kontrollert

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Petropoulos, NikolaosBeyglou, AliJohansson, DanielNovikov, EvgenyNyberg, Ulf

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