This video demonstrates the Varistem® ‘s ability to confine the blast force inside the ore mass, which allows for greater ore fragmentation and ore milling savings, and less fly rock, noise, and dust.
In this video, the Varistem® worked with drill cuttings (dust) as the stemming material. Only three drill holes blew, and the drill book showed excessive ANFO used. This limestone quarry reduced the drill size from 7⅞” (200mm) to 7⅜” (187mm) for a 10% ANFO savings. The improvement in blast containment also allowed them to increase the burden by 5% and the pattern spread by 10% for additional savings in ANFO and drill costs.
