To combat excessive blast overbreak in notoriously challenging ground conditions at two underground mines in the Goldfields of Western Australia, perimeter control products were trialled late last year.
Working with a mining customer, Dyno Nobel trialled its EZshot® LP hybrid electronic initiation system designed specifically for underground perimeter blasting.
Ultimately outperforming the other products, visual observations showed smooth, clean wall profiles and a significant reduction in scat material left behind in the tunnel ground support mesh; an indication of minimal blast-induced damage to the rock mass.
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