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The document summarizes a study on blasthole sampling methods conducted at the Batu Hijau copper-gold mine in Indonesia. Six sampling methods were tested on over 30 blasthole piles representing different lithologies, mineralization, alteration and grades. The cone and quarter method was considered the best representation as it sampled the largest amount of material. The study found that spear sampling was the simplest and most efficient method that provided reasonably accurate results. It is recommended tha

Author

rako

Language

EN