Abstract
The statistical consequences of ore-waste discrimination of individual blocks in a selective mining operation are examined. Average ore grade, tonnage, recovery, and a measure of profitability are graphed as functions of the cutoff-grade and the shape of the grade distributions. Grade distributions for blocks are simulated starting with various correlated fields of lognor-mally distributed sample grades. The resulting block distributions turned out to be also approximately lognormal so that the statistical results could be conveniently summarized as functions of the coefficient of variation for blocks of different size.
This work has been supported in part by the National Science Foundation (U.S.A.), Hanna Mining Company and the Standard Oil Company of California.
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References
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© 1976 D. Reidel Publishing Company, Dordrecht—Holland
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Switzer, P., Parker, H.M. (1976). The Problem of Ore Versus Waste Discrimination for Individual Blocks : The Lognormal Model. In: Guarascio, M., David, M., Huijbregts, C. (eds) Advanced Geostatistics in the Mining Industry. NATO Advanced Study Institutes Series, vol 24. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1470-0_13
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DOI: https://doi.org/10.1007/978-94-010-1470-0_13
Publisher Name: Springer, Dordrecht
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