Where does the explosive energy in rock blasting rounds go?

Document identifier: oai:DiVA.org:ltu-7751
Keyword: Engineering and Technology, Civil Engineering, Other Civil Engineering, Teknik och teknologier, Samhällsbyggnadsteknik, Annan samhällsbyggnadsteknik, Civil engineering and architecture - Geoengineering and mining engineering, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik, Mining and Rock Engineering, Gruv- och berganläggningsteknik
Publication year: 2004
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energySDG 12 Responsible consumption and production
The SDG label(s) above have been assigned by OSDG.ai


The energy partitioning of limestone production blasts has been measured under well controlled conditions; from rock properties determination, structural mapping and monitoring of drilling and charging, to VOD, 3D accelerometer and bench face movement measurements during the blast to post-blast fragment size measurements. The efficiency of the transfer of energy from the charges to the surrounding rock has been estimated by introducing a new explosives test, the cylinder expansion test, which is discussed to be-gin with. Hereby in-hole losses, seismic energy, kinetic energy of throw and fragmentation energy have been calculated. For the AN doped gassed bulk emulsion used in the quarry, it is estimated that 60-70 % of the explosive energy is transmitted to the rock, that the seismic and kinetic energy terms both amount to roughly 3-12 % and the fragmentation energy to less than 1-2 %. One candidate for the remaining losses, which are larger than the other three terms together, is the crushing of the blast-hole region. A rough estimate for the energy partitioning in bench blasting rounds is finally given.


Finn Ouchterlony

Luleå tekniska universitet; Geoteknologi
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Ulf Nyberg

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Mats Olsson

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Ingvar Bergqvist

Dyno Nobel Europe AB
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Lars Granlund

Dyno Nobel Europe AB
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Henrik Grind

Nordkalk AB
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