MSO Materials

In MSO, fields can be supplied in the block model and coded to indicate areas that might be included within, or excluded from, a custom proportion in stopes.

These settings are provided courtesy of the Block Model screen.

Material exclusion options are used to avoid the creation of stope-shapes within, say, deleterious-processing material or in poor rock-mass zones. The material in the model is flagged with a (numeric or alphanumeric) field and a value.

Up to three exclusion fields can be defined for each run. Each exclusion field permits a certain maximum tolerance of inclusion within a stopeshape.

Exclusion Distance can be used determine where stopes must be more than a set distance away from each other. This value is defined as the maximum fractional proportion of material (by volume) in the stope shape that is flagged as excluded.

Note: Material selection controls on the Block Model screen display both numeric and alphanumeric attributes.

The tolerance for each exclusion field is set independently, and allows for a maximum fractional proportion of the respective exclusion material to be incorporated into the stope shape.

For example, you may be mining a secondary pillar stope and the shape of the adjacent primary backfilled stopes may bulge into the secondary, so for practical purposes you may allow up to 5% (0.05 fraction) of backfill material within the secondary stope-shape.

If stope optimization is to be restricted to a specific zone then Include Material must be configured. The stope must be wholly or partially be within the inclusion zone, depending on the proportion set.

You can also use Exclude from Report to allow mined out material or voids to be ignored in the stope evaluation.

Zone Mixing lets you control mixing of material with different attributes. If a model has multiple ore types then stope-shapes are generated to not allow mixing of the ore types (as designated in the ore type field). No two field values from the list specified can be found in a stope.

You can also supply an Anneal Filter to control shape annealing. See What is Mineable Shape Optimizer?