ABSTRACT
Grade estimation is one of the most complicated aspects in mining. It also happens to be one of the most important. The complexity of grade estimation originates from scientific uncertainty, common to similar engineering problems, and the necessity for human intervention. The combination of scientific uncertainty and human judgement is common to all grade estimation procedures regardless of the chosen methodology. The GEMNet II system described in this paper was developed to provide a flexible but complete alternative method to existing grade estimation techniques, which takes into consideration the theory behind ore deposit formation while minimising the dependence on certain assumptions.
