Simple Reserving Procedure

The steps to perform simple reserve calculations are as shown below. Detailed information on each option can be found in the option's description. See Appendix B for more involved reserve calculations techniques.

1. Files > Select Polygons
   Load the polygons from a design database and then click inside each polygon to select it for reserving. Polygons can also be selected by drawing a rubber band around them or by specifying their name. The sequence of picking can be saved in a sequences file. A polygon's colour changes to red when it is ready to be reserved.
2. Units > Units, Density, Precision and Classify
   In the Units option, set the units of measurement to be used for reporting purposes.

   In the Density option, set the density value. The density refers to the default density and is applied to coal volumes to convert them to mass units. Density is specified as a "tonnage units" per "volume unit", for example tons per cubic foot or tonnes per cubic metre. If a density grid has been created and loaded in Rsvute, it will override the default value.

   In the Precision option, set the required precision for reserve report results. Results can be reported to, for example, the nearest thousand or million.

   In the Classify option define the output criteria for measured, indicated and inferred reserves.
3. Reserves > Set Mask Mode
   Although grid masks can be used to restrict the reserves, they are less accurate and the Set Mask Mode is therefore usually set to "Ignore Grid Mask". Limit polygons (also referred to as limit lines) are the preferred way of limiting seam extents. Limit polygons are derived from the modelling process and stored in the startup design database.
4. Reserves > Horizon Parameters
   In this option individual seam limit layers are defined. If multiple limit layers are to be applied to each seam, the layers must be named in such a way that the use of a wildcard (* multi-character and % single character) will apply each polygon to the reserve process. Examples of this naming convention are:

   C2_lim (seam extents) C2as_lim (ash limit) C2su_lim (sulphur limit) C2bt_lim (btu limit) C2dp_lim (depth limit) C2tk_lim (thickness limit)

   i.e. you can enter C2*.
5. Reserves > Coal Variables
   Define the variable for coal thickness (tk or rm), the density grid variable (rd) and the name of the product for the reserve report.
6. Reserves > Report Reserves
   The Report Reserves option calculates the reserves for those polygons currently selected. Once calculated, these polygons become green.