Quarry Savings and Environmental Impact Reduction from Air Blast
Field experience confirms that air deck of 20%-30% is possible without noticeable loss of blast fragmentation.
Every meter reduction of explosives translates directly into quarry savings. Plus, better containment equals less secondary breakage and crusher output (See 12 Month Gold Crusher Study by University of Mines & Technology, Ghana).
Reduction of oversized fragments in stemming area with VARISTEM® usage and with shorter stemming heights. Explosive gases work higher without risk of stemming ejection. Better blast containment with VARISTEM® over using stemming rock alone (see Study on 27% Fragmentation Improvement).