Reserve Calculations

Vulcan 's reserve reporting option is user definable. It allows the user to select the variables for reporting. The triangulations or polygons to intersect with the block model can be picked off the screen or from a list. This means that the results for many areas of interest can be calculated in one step, and passed on to Chronos, the Vulcan scheduler. The blocks to report on may be restricted using various numeric or character tags as well as triangulations. Various cut-off limits may be selected for grade tonnage analyses.

Once the reserves have been calculated, the user can define report formats in the form of spreadsheet tables. In addition to the reported variables, derived columns may also be calculated and reported. The derived columns can be calculated by using normal arithmetic functions and may also have conditions applied to them. Many spreadsheet formats (tables) may be setup and saved for re-use in the next period. The results may be saved to a file or posted in the graphics for plotting in conjunction with other graphical features such as the stope outlines.

In stratiform deposits, it is not necessary to use block models, although this is often the case in highly faulted areas. Here the respective values can be calculated at each node of a grid mesh and the stratigraphic reserves option used to calculate grades inside mining blocks or polygons. This option also allows for the calculation of overburden and midburden values.