Why do my results around the pit fall to the bottom of the model instead of following the topography?

This question was raised during the live session of GEOVIA CONNECT 25X: Rethink What’s Possible in Mine Planning and Design for Open Pit Mines. If you were unable to attend, the session is now available on demand at the link below.

 

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GEOVIA CONNECT 25X:  Maximizing your Pit Optimization with Whittle

 

Here's the response from @Cory CASE, GEOVIA User Success Specialist - Dassault Systèmes:

 

Cory CASE
GEOVIA User Success Specialist
Dassault Systèmes

 

This happens when air blocks or waste blocks are not imported. Without them, Whittle cannot generate a topography and treats everything as air, causing the shell to drop to the bottom of the model.

It can also occur if the model is constrained (only partial model imported).If air blocks are imported with density, the shell may rise to the top instead, this is also a useful debugging check.