Average Stripping Ratio Calculator

Audit actual independently matched CumulativePit inventory deltas, not forecast nested-shell stripping or a bank-volume density converter; previous figures explicitly identify scenario baseline. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

A cumulative-pit stripping comparison needs matching current and previous waste and ore inventories.

A cumulative-pit stripping comparison needs matching current and previous waste and ore inventories.^[1]

Incremental waste divided by incremental ore is different from the ratio of the current totals.

When to use Average Stripping Ratio 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 Average Stripping Ratio Calculator and understand its results

Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
Enter observedCumulativePitWasteTonnes, observedCumulativePitOreTonnes, callerPreviousCumulativePitWasteTonnes, callerPreviousCumulativePitOreTonnes, using the field meanings and rules below, then run the tool.
Read observedIncrementalWasteOreRatios. 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
observedCumulativePitWasteTonnes	Observed cumulative pit waste tonnes	list of number	Required
observedCumulativePitOreTonnes	Observed cumulative pit ore tonnes	list of number	Required
callerPreviousCumulativePitWasteTonnes	Caller previous cumulative pit waste tonnes	list of number	Required
callerPreviousCumulativePitOreTonnes	Caller previous cumulative pit ore tonnes	list of number	Required

Use four nonempty aligned nonnegative tonne lists. Subtract previous waste from current waste and previous ore from current ore. Require waste increment≥0 and ore increment>0, then divide per row. This tool uses the same incremental rule even for the average-stripping title.

incrementalRatio_i=(currentWaste_i−previousWaste_i)/(currentOre_i−previousOre_i)

Use the matching field units and the exact boundary, ordering and reference rules above.

Output field	Meaning	Value type
observedIncrementalWasteOreRatios	Observed incremental waste ore ratios	list of number

json

{
  "input": {
    "observedCumulativePitWasteTonnes": [
      10,
      30
    ],
    "observedCumulativePitOreTonnes": [
      5,
      10
    ],
    "callerPreviousCumulativePitWasteTonnes": [
      0,
      10
    ],
    "callerPreviousCumulativePitOreTonnes": [
      0,
      5
    ]
  },
  "output": {
    "observedIncrementalWasteOreRatios": [
      2,
      4
    ]
  }
}

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 Incremental Stripping Ratio Calculator: A incremental-shell stripping comparison needs matching current and previous waste and ore inventories. For a complementary comparison, use Ore Waste Ratio Calculator: An ore-to-waste weighing ratio is the inverse direction of a waste-to-ore stripping ratio.

References

Average Stripping Ratio Calculator — tool.io

Similar or alternative tools

Incremental Stripping Ratio Calculator
A incremental-shell stripping comparison needs matching current and previous waste and ore inventories.
Ore Waste Ratio Calculator
An ore-to-waste weighing ratio is the inverse direction of a waste-to-ore stripping ratio.