Contrary to popular belief, creating a block model in the Maptek Vulcan software package is not overly difficult. Estimating grades for the block model can be as tedious and convoluted as you want it to be but creating the shell for that model to go in is an elementary exercise.
|Block Model slice showing air (blue), country rock (brown) and ore (red).|
To start, create a new block definition file (*.bdf) by selecting Block > Construction > New Definition. By selecting this menu option you will enable the Block Model utility in Vulcan Workbench and open the Block Definition panel.
|Block Model Orientation - defines origin and rotation.|
The first decision we need to make in creating our block model is the origin and orientation of the model. The origin is the minimum x, y and z coordinate of the block model. Fill in the fields ‘X Coordinate:’, ‘Y Coordinate:’ and ‘Z Coordinate:’ with the appropriate values. These should usually be something farther east and south than the deposit we are modeling and at a lower elevation. Don’t get too carried away, we don’t want to model the entire country, just enough to contain a mine design.