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18:47
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Originally posted by ozbucheron
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So a 1:7 decline with say 50% ancillary development, 1:10.5 in all, cannot advance 1,575m per year (not much more than a cut a day) or 150 vertical metres per annum. Is that what you are saying? Head back to your text book and read it more carefully. You'll find that 70 vertical metres per annum is a measure used to estimate the time to fully extract a block of undeveloped ore, i.e. decline to the base of the stoping block, establish infrastructure, complete ore development and stope out and backfill the block.
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Correct , in simple terms its called staged development, hence RVR calling the material going to ROM pad development ore..... Let's not over complicate it @5hareholder .
