Rock Bolt Bond Strength Calculator
Infer apparent uniform bond shear from already observed pullout data/independent bonded geometry, no pullout testing instructions or bolt support capacity approval. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
An apparent uniform bond shear divides a measured pullout force by the bonded cylindrical area.
An apparent uniform bond shear divides a measured pullout force by the bonded cylindrical area.1
The model depends on an independently established bonded diameter and length.
When to use Rock Bolt Bond Strength 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 Rock Bolt Bond Strength Calculator and understand its results
- Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
- Enter observedBoltPulloutForcesN, observedBondedDiametersM, observedBondedLengthsM, using the field meanings and rules below, then run the tool.
- Read apparentObservedBondShearPa. 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 |
|---|---|---|---|
| observedBoltPulloutForcesN | Observed bolt pullout forces n | list of number | Required |
| observedBondedDiametersM | Observed bonded diameters m | list of number | Required |
| observedBondedLengthsM | Observed bonded lengths m | list of number | Required |
Use aligned forces≥0 N, diameters>0 m and bonded lengths>0 m. Divide force by π×diameter×length and return pascals.
apparentShear_i=force_i/(π diameter_i bondedLength_i) Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| apparentObservedBondShearPa | Apparent observed bond shear pa | list of number |
{
"input": {
"observedBoltPulloutForcesN": [
100,
200
],
"observedBondedDiametersM": [
0.1,
0.2
],
"observedBondedLengthsM": [
1,
2
]
},
"output": {
"apparentObservedBondShearPa": [
318.3098861837907,
159.15494309189535
]
}
}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 Rock Bolt Tension Calculator: Calibrated axial stiffness and measured strain can infer bolt tension above an independently observed preload. For a complementary comparison, use Rock Support Pressure Calculator: Contact force divided by contact area describes observed support pressure.
References
-
Rock Bolt Bond Strength Calculator — tool.io
Similar or alternative tools
- Rock Bolt Tension Calculator
Calibrated axial stiffness and measured strain can infer bolt tension above an independently observed preload.
- Rock Support Pressure Calculator
Contact force divided by contact area describes observed support pressure.