Constraints
In Pit Design, constraints can be used to determine build areas for a pit build. Creating or assigning a polygon or a series of polygons as a Base, Flat Area or Pillar constraint will mark the area inside or outside of the polygon/s as build area, depending on the constraint.
In Shrinking mode (Pit/Down, Dump/Up), a Pillar constraint is internal and will place the pit build area inside the constraint where it intersects with any pit lines. No constraint will occur if there is no intersection. A flat area constraint is external will place the pit build area outside of any intersection between constraint polygon and pit string.
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| Pillar (Internal) Constraint | Flat Area (External) Constraint |
In Expanding mode (Pit/Up, Dump/Down), constraints always expand the pit build area.
Micromine Origin & Beyond provides tools to apply constraints to your design by either selecting existing polygons to mark as internal or external constraints, or digitising a new constraint as internal or external.
For information on digitising a new internal or external constraint, see:
For information on applying internal or external constraints using existing polygons, see: