The interaction of faults with the groundwater flow regimen on an open pit is a challenge on the conceptualization and simulation. Having smaller cells on the faults alignment with higher K can represent the general behaviour of faults and this is possible to simulate with MODFLOW 6 Voronoi models with Flopy and mf6Voronoi package. We have created a tutorial that implements faults on the area of influence from an open pit and defines zone budgets for the pit and drainage network.

This tutorial is based from the model generated on this tutorial:

hatarilabs.com/ih-en/simulation-of-open-pit-inflows-using-modflow-6-and-mv6voronoi-tutorial