Overburden Thickness Calculator

Audit independently identified Overburden paired contact-depth observations separately from unresolved contacts; depths share caller datum and section conventions, no geological correlation or geodesy. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

A overburden survey uses paired upper and lower contacts on a shared downward-positive depth datum.

A overburden survey uses paired upper and lower contacts on a shared downward-positive depth datum.^[1]

Unresolved pairs are distinct from measured zero thickness.

When to use Overburden Thickness 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 Overburden Thickness Calculator and understand its results

Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
Enter observedOverburdenUpperContactDepthM, observedOverburdenLowerContactDepthM, knownOverburdenContactPairFlags, using the field meanings and rules below, then run the tool.
Read knownContactThicknessM, unknownContactPairCount. 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
observedOverburdenUpperContactDepthM	Observed overburden upper contact depth m	list of number	Required
observedOverburdenLowerContactDepthM	Observed overburden lower contact depth m	list of number	Required
knownOverburdenContactPairFlags	Known overburden contact pair flags; binary 1 means the matched observation is known, 0 means unknown	list of number	Required

Use aligned nonnegative upper and lower depths with binary known flags. For known pairs require lower≥upper and append lower−upper in original order. Return only known thicknesses and the count of unknown pairs. Unknown pairs still need nonnegative depths but do not undergo the difference-order check.

knownThicknesses=[lower_i−upper_i where known_i=1]; unknownCount=Σ(1−known_i)

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

Output field	Meaning	Value type
knownContactThicknessM	Known contact thickness m	list of number
unknownContactPairCount	Unknown contact pair count; unresolved records kept separate from known results	number

json

{
  "input": {
    "observedOverburdenUpperContactDepthM": [
      10,
      20
    ],
    "observedOverburdenLowerContactDepthM": [
      15,
      30
    ],
    "knownOverburdenContactPairFlags": [
      1,
      0
    ]
  },
  "output": {
    "knownContactThicknessM": [
      5
    ],
    "unknownContactPairCount": 1
  }
}

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 Interburden Thickness Calculator: A interburden survey uses paired upper and lower contacts on a shared downward-positive depth datum. For a complementary comparison, use Ore Body Depth Calculator: A ore-depth contact survey uses paired upper and lower contacts on a shared downward-positive depth datum.

References

Overburden Thickness Calculator — tool.io

Similar or alternative tools

Interburden Thickness Calculator
A interburden survey uses paired upper and lower contacts on a shared downward-positive depth datum.
Ore Body Depth Calculator
A ore-depth contact survey uses paired upper and lower contacts on a shared downward-positive depth datum.