Large-scale panel destress blast at Brunswick mine

Patrick P. Andrieux, Richard K. Brummer, Qian Liu, Bradford P. Simser, Ali Mortazavi

Research output: Contribution to specialist publicationArticle

14 Citations (Scopus)


A large-scale panel destress blast was fired at Brunswick mine in the fall of 1999 in order to reduce the ground stresses in a critically important neighbouring mining region. This work, sponsored by the Mining Division of CAMIRO and Brunswick mine, consisted in heavily choke-blasting - and subsequently leaving in place - a massive waste sulphide pillar in the southwest end of the 1000 m level. This paper describes the approach and design methodology used to try to maximize breakage in the rock mass in the area to destress, while minimizing damage to critical infrastructures in the vicinity. The loading operations, as well as the results of the blast - in terms of its field performances, as recorded by near-field blast vibration monitoring equipment, visual postblast assessments and measured impact on the regional stress field - are discussed as well. A brief comparison between the measured stress changes and inelastic numerical modelling of the test site is also presented.

Original languageEnglish
Number of pages10
Specialist publicationCIM Bulletin
Publication statusPublished - Nov 1 2003
Externally publishedYes


  • Destress blasting
  • Discrete element inelastic numerical stress modelling
  • Instrumentation
  • Monitoring

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Metals and Alloys

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