Computes tailings-to-ore and waste-rock (strip) ratios, core circular
economy and mineral-waste metrics under GRI 306 / GRI 11.8 and the
Global Industry Standard on Tailings Management (GISTM) context.
Usage
calculate_waste_intensity(ore_processed_kt, tailings_kt, waste_rock_kt = NULL)
Arguments
- ore_processed_kt
Numeric. Ore processed in kilotonnes. Must be > 0.
- tailings_kt
Numeric. Tailings produced in kilotonnes.
- waste_rock_kt
Numeric. Optional. Waste rock moved in kilotonnes.
Value
A named list with metric, tailings_ratio (t tailings / t ore)
and, when supplied, waste_rock_ratio (strip ratio) and
total_mineral_waste_kt.
Examples
calculate_waste_intensity(18481, 17750, waste_rock_kt = 45412)
#> $metric
#> [1] "SDG 12.4 / 12.5 - Mineral Waste Intensity"
#>
#> $tailings_ratio
#> [1] 0.96
#>
#> $waste_rock_ratio
#> [1] 2.457
#>
#> $total_mineral_waste_kt
#> [1] 63162
#>