Room and Pillar Width Calculator

Reconcile measured repeating-cell pitch/room residual versus independent pillar width survey, not target extraction ratio inverse or pillar support design. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

A repeating-cell pitch minus room width gives an equivalent residual pillar width.

A repeating-cell pitch minus room width gives an equivalent residual pillar width.^[1]

An independently surveyed pillar width can test that simplified geometric record.

When to use Room and Pillar Width 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 Room and Pillar Width Calculator and understand its results

Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
Enter observedPillarCellPitchesM, observedMatchedRoomWidthsM, observedIndependentPillarWidthsM, using the field meanings and rules below, then run the tool.
Read cellResidualEquivalentPillarWidthsM, signedSurveyPillarDiscrepanciesM. 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
observedPillarCellPitchesM	Observed pillar cell pitches m	list of number	Required
observedMatchedRoomWidthsM	Observed matched room widths m	list of number	Required
observedIndependentPillarWidthsM	Observed independent pillar widths m	list of number	Required

Use aligned positive pitches and nonnegative room and independent pillar widths. Require pitch−room≥0. Return residual widths and independentWidth−residualWidth.

residual_i=pitch_i−room_i; discrepancy_i=surveyPillar_i−residual_i

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

Output field	Meaning	Value type
cellResidualEquivalentPillarWidthsM	Cell residual equivalent pillar widths m	list of number
signedSurveyPillarDiscrepanciesM	Signed survey pillar discrepancies m; preserve the subtraction order and sign defined in the mechanics	list of number

json

{
  "input": {
    "observedPillarCellPitchesM": [
      5,
      8
    ],
    "observedMatchedRoomWidthsM": [
      2,
      3
    ],
    "observedIndependentPillarWidthsM": [
      3,
      4
    ]
  },
  "output": {
    "cellResidualEquivalentPillarWidthsM": [
      3,
      5
    ],
    "signedSurveyPillarDiscrepanciesM": [
      0,
      -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 Room Width Calculator: Paired wall offsets measured from one datum give a room’s clear width. For a complementary comparison, use Pillar Width to Height Ratio Calculator: A pillar’s width-to-height ratio summarizes observed morphology.

References

Room and Pillar Width Calculator — tool.io

Similar or alternative tools

Room Width Calculator
Paired wall offsets measured from one datum give a room’s clear width.
Pillar Width to Height Ratio Calculator
A pillar’s width-to-height ratio summarizes observed morphology.