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Strip ratio and powder factor
Track waste moved per tonne of ore and explosive use per tonne blasted.
Operations & supply chainMining
How it's worked out
- Strip ratio = waste ÷ ore. Powder factor = explosives ÷ rock blasted
- Same period
NoteA rising strip ratio raises cost per tonne of ore even when unit mining cost is flat.
Source: Mining engineering practice (SME Mining Engineering Handbook)
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