Input requirements

The Pit Optimisation Export functions (MM to Whittle and MM to MineMax) require the following inputs:

  1. A block model file generated in the 2D or 3D Block Estimate functions in Micromine.
  2. A DTM to define the surface shape.
  3. All blocks must be an integer factor of the largest block size. For example if the largest blocks in the block model are 10 x 10 x 10, blocks of 5 x 5 x5, 2 x 2 x2, 1 x 1 x 1, 5 x 2 x 5 etc. are allowed. Blocks of 3 x 3 x 3 would not be allowed.
  4. The block model must have fields for Easting, Northing, Z and Grade. It can optionally contain fields that define any or all of the following:
  • Multiple grades  (Called "elements" in Whittle).
  • Density  Density of Ore. This is a Tonnage Factor in Imperial Projects.
  • WASTE Density  Density of waste rock. This is a tonnage factor in Imperial Projects.
  • MCAF  (Mining Cost Adjustment Factor) if mined as ore.
  • WASTE MCAF  (Waste Mining Cost Adjustment Factor) if mined as waste.
  • PCAF  (Processing Cost Adjustment Factor) if material (ore) is processed in a mill.
  • WASTE PCAF  (Waste Processing Cost Adjustment Factor) if waste material is processed in a mill.
  • Rock Code  Different rock types in Whittle.
  • Ore Factor  A factor between 0 and 1 defining the amount of an MM ore block which is ore.
  • Waste Factor  A factor between 0 and 1 defining the amount of a MM ore block which is waste.
  • Internal Air  A factor between 0 and 1 defining the amount of a MM ore block which is internal air (for example, a stope or a drive).
  • Domain Factor  A factor between 0 and 1 defining the amount of a MM ore block which is included in another block elsewhere in the block model file.
  • Profile Index  Defines the pit profile index that Whittle will use to define the pit slopes.

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