An alternative mining plan is to develop two levels, below the upper A Level, and mine only
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An alternative mining plan is to develop two levels, below the upper A Level, and mine only the high grade. The B Level would be in the 43 ft of high grade, while the C level would be in the lower 20 ft of high grade in the 102 ft column shown in the detailed geologic column. Determine the maximum possible roof span for the B Level.
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Given New mining plan Problem 32 18 11 14 43 25 20 Find Lmax BLevel Bonneterre ...View the full answer
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