By Seequent Senior Resource Geologist Carrie Nicholls
In this blog, I will teach you how to use Leapfrog EDGE to report using open pit shells.
You have completed the resource model and now you need to compile the table of resource figures. If there has been mining activity, either historic or present, then the deposit will have to be depleted. In addition, if appropriate and available, you will most likely need to constrain the resources with a resource pit shell and/or underground stope optimisation.
Whether it is an open pit shell or closed volumes, as would be the case with underground mining, the basic procedure will be the same. A ‘Geological Model’ will need to be made to represent the reporting volumes. The estimated grade model as completed in Leapfrog EDGE and the ‘pit’ model will be evaluated onto a block model. This will then be used to report the resources at the cut-offs required. Creating the ‘pit’ model itself is straight forward. Some open pit surfaces may be a little trickier to incorporate, for example if the pit edge daylights it may not be enough to extend to the geological model extents. If it’s not be possible to go back to the mining engineer who made it to extend the pit shell, I’ll show you how to deal with this.