Abstract
1. For a specified intensity of blast load for a given rock, there exists a threshold of over-breakup (“super breakup”). 2. The quality of the breakup for high unit consumption of explosives is improved with an increase in the rate of blast transformation. 3. For intensive blast loads, a decrease is observed in the energy capacity for mechanical breakup, crushing of ferruginous quartzites proceeds better, and the exposure of magnetite grains is improved. 4. In planning beneficiation plats, it is necessary to consider the effect of the level of blast loads upon crushability and processability, together with the parameters of these properties in varieties of ore, which must lead to corresponding certification of ores undergoing beneficiation.
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