Ore Loss Percentage Calculator
Audit independently assessed unrecovered ore separately from unassessed called inventory, not recovered ore minus diluent or plant metal recovery. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
An ore-loss fraction needs matched called and unrecovered inventory on a common basis.
An ore-loss fraction needs matched called and unrecovered inventory on a common basis.1
Unassessed called inventory is reported separately from the known loss fraction.
When to use Ore Loss Percentage Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
How to use Ore Loss Percentage Calculator and understand its results
- Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
- Enter observedCalledOreTonnes, observedUnrecoveredOreTonnes, knownLossAssessmentFlags, using the field meanings and rules below, then run the tool.
- Read knownOreLossFraction, unknownCalledOreTonnes. Inspect nested result fields where present, and review unknown records separately from known matches.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedCalledOreTonnes | Observed called ore tonnes | list of number | Required |
| observedUnrecoveredOreTonnes | Observed unrecovered ore tonnes | list of number | Required |
| knownLossAssessmentFlags | Known loss assessment flags; binary 1 means the matched observation is known, 0 means unknown | list of number | Required |
Use aligned called tonnes>0, unrecovered tonnes≥0 and binary known flags. For known rows require unrecovered≤called. Require positive known called total; return known unrecovered/known called and unknown called tonnes. An unknown placeholder does not contribute loss.
knownLoss=Σ_known unrecovered/Σ_known called; unknownCalled=Σ_unknown called Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| knownOreLossFraction | Known ore loss fraction; dimensionless fraction, not a percent | number |
| unknownCalledOreTonnes | Unknown called ore tonnes; unresolved records kept separate from known results | number |
{
"input": {
"observedCalledOreTonnes": [
10,
20
],
"observedUnrecoveredOreTonnes": [
1,
4
],
"knownLossAssessmentFlags": [
1,
0
]
},
"output": {
"knownOreLossFraction": 0.1,
"unknownCalledOreTonnes": 20
}
}Limitations and assumptions
Units, ledger boundaries, survey interpretation and model applicability must be independently established. These summaries do not assign reserve/resource classifications or establish support adequacy, ventilation safety or an operating setting.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.
Alternative or Complementary methods
For a related step, use Ore Loss Skin Thickness Calculator: An equivalent ore-loss skin thickness divides surveyed unrecovered volume by independently exposed ore-face area. For a complementary comparison, use Mine Recovery Factor Calculator: A mine-stage dry-ore reconciliation compares independently matched baseline and after-stage inventories.
References
-
Ore Loss Percentage Calculator — tool.io
Similar or alternative tools
- Ore Loss Skin Thickness Calculator
An equivalent ore-loss skin thickness divides surveyed unrecovered volume by independently exposed ore-face area.
- Mine Recovery Factor Calculator
A mine-stage dry-ore reconciliation compares independently matched baseline and after-stage inventories.