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

Abstract:

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.

Authors

Finn Ouchterlony

Luleå tekniska universitet; Geoteknologi
Other publications >>

Ulf Nyberg

Other publications >>

Mats Olsson

Other publications >>

Ingvar Bergqvist

Dyno Nobel Europe AB
Other publications >>

Lars Granlund

Dyno Nobel Europe AB
Other publications >>

Henrik Grind

Nordkalk AB
Other publications >>

Documents attached


Click on thumbnail to read

Record metadata

Click to view metadata