A complex 3D mining example

This example demonstrates a complex 3D mining model complete with simulation of all accesses and drifts. 

The model was constructed with 236 3D blocks using FF (fictitious force) elements to describe various excavations. From this data, Map3D generated 1536 surfaces and subsequently discretized these into 7830 boundary elements, thus requiring over 61000 degrees of freedom. 8903 grid points were calculated for display of the results. In this model very little lumping was allowed owing to the requirement of high accuracy. The matrix size required for this analysis was still only 846 MBytes.