Longwall Dilution Calculator
Separate actual roof/floor longwall dilution source inventory, not generic assay blending, recovered-coal face advance or equal-density volume assumption. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
Longwall dilution can separate roof and floor waste from undiluted coal.
Longwall dilution can separate roof and floor waste from undiluted coal.1
Fractions use the combined material total on the supplied mass basis.
When to use Longwall Dilution 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 Longwall Dilution Calculator and understand its results
- Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
- Enter observedLongwallRoofWasteTonnes, observedLongwallFloorWasteTonnes, observedUndilutedCoalTonnes, using the field meanings and rules below, then run the tool.
- Read observedLongwallRoofDilutionFraction, observedLongwallFloorDilutionFraction, totalObservedLongwallDilutionFraction. 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 |
|---|---|---|---|
| observedLongwallRoofWasteTonnes | Observed longwall roof waste tonnes | list of number | Required |
| observedLongwallFloorWasteTonnes | Observed longwall floor waste tonnes | list of number | Required |
| observedUndilutedCoalTonnes | Observed undiluted coal tonnes | list of number | Required |
Use aligned nonnegative roof waste, floor waste and coal tonnes. Require their total>0. Return roof/total, floor/total and (roof+floor)/total as fractions.
total=Σroof+Σfloor+Σcoal; dilution=(Σroof+Σfloor)/total Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedLongwallRoofDilutionFraction | Observed longwall roof dilution fraction; dimensionless fraction, not a percent | number |
| observedLongwallFloorDilutionFraction | Observed longwall floor dilution fraction; dimensionless fraction, not a percent | number |
| totalObservedLongwallDilutionFraction | Total observed longwall dilution fraction; dimensionless fraction, not a percent | number |
{
"input": {
"observedLongwallRoofWasteTonnes": [
2,
3
],
"observedLongwallFloorWasteTonnes": [
1,
2
],
"observedUndilutedCoalTonnes": [
10,
20
]
},
"output": {
"observedLongwallRoofDilutionFraction": 0.13157894736842105,
"observedLongwallFloorDilutionFraction": 0.07894736842105263,
"totalObservedLongwallDilutionFraction": 0.21052631578947367
}
}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 Mining Dilution Percentage Calculator: Mining dilution on a dry-mass basis separates recovered ore and diluent after moisture corrections. For a complementary comparison, use Dilution Volume Calculator: Excess extraction volume compares an as-mined cross-section with an independently established ore envelope.
References
-
Longwall Dilution Calculator — tool.io
Similar or alternative tools
- Mining Dilution Percentage Calculator
Mining dilution on a dry-mass basis separates recovered ore and diluent after moisture corrections.
- Dilution Volume Calculator
Excess extraction volume compares an as-mined cross-section with an independently established ore envelope.