Bench Width
Assemble nonoverlapping caller working-bench equipment, lane, stand-off and rockfall allocations; not a traffic or geotechnical safety standard.
Description
Working-bench width allocates space for equipment, travel and separation from hazards.
Working-bench width allocates space for equipment, travel and separation from hazards. Adding nonoverlapping allocations produces a requested working width.1
The tool returns requiredWorkingBenchWidthM. The computation uses supplied observations and parameters rather than acquiring measurements.
When to use Bench Width
Use this for the following task: Assemble nonoverlapping caller working-bench equipment, lane, stand-off and rockfall allocations; not a traffic or geotechnical safety standard. Prepare observations and calibration parameters on the same unit and reporting basis.
How to use Bench Width and understand its results
- Prepare the measured quantities and supplied model parameters. Match the units and align paired lists before calculating.
- Enter workingEquipmentWidthM, travelLaneWidthM, standOffM, rockfallAllowanceM according to the field table, then run the tool.
- Read requiredWorkingBenchWidthM. Use the calculation below to interpret the selected mean or the model’s signs, units and comparison flags.
- Review the supplied assumptions and calibration before comparing or reporting the result.
| Input field | Meaning | Value type and bounds | Requirement |
|---|---|---|---|
| workingEquipmentWidthM | Working equipment width m | number | Required |
| travelLaneWidthM | Travel lane width m | number | Required |
| standOffM | Stand off m | number | Required |
| rockfallAllowanceM | Rockfall allowance m | number | Required |
Use positive equipment and lane widths with nonnegative stand-off and rockfall allowance, all in metres. Sum the four allocations once each.
working width = equipmentWidth+travelLaneWidth+standOff+rockfallAllowance The symbols and boundary conditions refer to the supplied fields and the implementation described above.
| Output field | Meaning | Value type |
|---|---|---|
| requiredWorkingBenchWidthM | Required working bench width m | number |
{
"input": {
"workingEquipmentWidthM": 8,
"travelLaneWidthM": 6,
"standOffM": 2,
"rockfallAllowanceM": 3
},
"output": {
"requiredWorkingBenchWidthM": 19
}
}Limitations and assumptions
Overlap between allocations would overstate the sum. The result does not establish traffic capacity, geotechnical safety or conformity with a design standard.
Numerical inputs must be finite. Input-shape and calculation checks do not establish measurement quality or the validity of a supplied calibration.
Alternative or Complementary methods
Choose Berm Width when you need its operation: Screen catch-berm width against caller-calibrated height/intercept relation; rockfall trajectories, retained debris and legal criteria are not inferred. Choose Ramp Width for the complementary operation: Sum caller vehicle/lane/clearance/drain/barrier allocations; does not replace site-specific passing-sight and road design.
Background reference: Design of Surface Mine Haulage Roads: A Manual.
References
-
Design of Surface Mine Haulage Roads: A Manual — U.S. Bureau of Mines, Information Circular 8758
Similar or alternative tools
- Berm Width
Screen catch-berm width against caller-calibrated height/intercept relation; rockfall trajectories, retained debris and legal criteria are not inferred.
- Ramp Width
Sum caller vehicle/lane/clearance/drain/barrier allocations; does not replace site-specific passing-sight and road design.