Ore Body Thickness Calculator
Correct independently oriented actual drill intercepts to layer-normal thickness, not assumed vertical section height or geological continuity. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
A drill intercept is longer than the layer-normal thickness when the borehole crosses obliquely.
A drill intercept is longer than the layer-normal thickness when the borehole crosses obliquely.1
The correction needs the borehole-to-layer-normal angle.
When to use Ore Body 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 Ore Body Thickness Calculator and understand its results
- Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
- Enter observedInterceptLengthsM, callerBoreholeToLayerNormalAnglesDeg, using the field meanings and rules below, then run the tool.
- Read observedNormalOreThicknessM. 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 |
|---|---|---|---|
| observedInterceptLengthsM | Observed intercept lengths m | list of number | Required |
| callerBoreholeToLayerNormalAnglesDeg | Caller borehole to layer normal angles deg | list of number | Required |
Use aligned intercept lengths≥0 and independently oriented angles 0≤θ<90 degrees. Multiply length by cos(θπ/180); an angle to the layer plane would require a different convention.
normalThickness_i=intercept_i cos(angleToNormal_i π/180) Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedNormalOreThicknessM | Observed normal ore thickness m | list of number |
{
"input": {
"observedInterceptLengthsM": [
10,
20
],
"callerBoreholeToLayerNormalAnglesDeg": [
0,
60
]
},
"output": {
"observedNormalOreThicknessM": [
10,
10.000000000000002
]
}
}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 Ore Loss Skin Thickness Calculator: An equivalent ore-loss skin thickness divides surveyed unrecovered volume by independently exposed ore-face area. For a complementary comparison, use Ore Body Dip Calculator: A down-dip section can be summarized by a fitted signed contact slope.
References
-
Ore Body Thickness Calculator — tool.io
Similar or alternative tools
- Ore Loss Skin Thickness Calculator
An equivalent ore-loss skin thickness divides surveyed unrecovered volume by independently exposed ore-face area.
- Ore Body Dip Calculator
A down-dip section can be summarized by a fitted signed contact slope.