Reserve Classification

The Reserve Classification procedure provides a report based on the area of each zone.  To convert the areas to tons, use the Surface Mine Reserve Reporting (found in either the Geology or Surface Mining module procedure) after using the Reserve Classification routine.  This routine can be run to define the density of exploration data for thickness (which yields tons) and also qualities dividing it into various zones based on the distance to the closest drillhole. The reserve estimation is less reliable when the closest drillhole is farther away. Typically the following zones are defined by the following distances:

Measured <1320ft
Indicated >1320ft, <3960ft
Inferred >3960ft, <15840ft
Hypothetical >15840ft

The first prompt is to create a new, or select an existing Reserve Classification file *.RSV.

The next step is to define a strata name to search for in the drillholes selected along with the quality name and name of the grid file to use. The program processes each line in the list, taking into account only drillholes which have strata specified and calculating from the grid quality values for each zone.

• Strata: This window is to choose a strata or bed name that appears in the drillholes to classify.
• Quality: This is the quality attribute to analyze, such as thickness, BTU, Calcium, etc.
• Grid: This is the grid name that has been created from the drillholes. It will compare these modeled values with the occurrences and spacing in the drilling.
• Match Both Strata and Quality: This will make sure that the quality and strata name both are defined in a drillhole. If just the strata name is there, but no quality sample, then it will not be used as a sample point that is measured.
• Inc/Excl Layer: These are the layers that the perimeters are drawn in.
• Result Layer Prefix: This is a prefix it will put in front of the output layer names.
• Draw Polylines: This will draw the perimeter polylines that contain the hatching for the four classifications.
• Draw Hatch: This will draw the hatching inside the perimeters and boundaries of classifications.
• Skip Report: This option just does the CAD graphics and mapping only, not generating the report.
• Assign Pit Names: This option will give a Pit Name to each perimeter, so it may be used for other volume calculations with commands such as Surface Mine Reserves.

The command uses property lines, or at the least, an inclusion polyline, to define the extent of the area of reserve. Nothing will be calculated if there is no property line or standard inclusion perimeter selected, and the following error will appear. 

The owner name associated with the property line will also be reported, making estimation of royalties an easy task. Optionally, the inclusion perimeter may be specified to limit area of calculations.

The results are shown as colored maps layerized by the chosen quality, with color changing based on the corresponding reserve class.

Prompts

Select Reserve File dialog
Reserve Classification dialog
Select Drillholes to process: select drillholes to use in calculations
Select Inclusion polyline:
Report Formatter Dialog

Pulldown Menu Location: StrataCalc
Keyboard Command: reserve_class