Use Polygon Sub-Stope Shapes

This method of sub-stoping in MSO allows full control over sub-stope layout based on polygonal divisions and variable cutoff scaling. This can be useful for domain-specific design.

Note: This topic relates to the generation of sub-stope shapes during stope optimization with MSO.

Activity steps

  1. Define your MSO scenario, block model, economics, orientation and shapes.

  2. Display the Advanced screen.

  3. Check Stope Layout >> Create Full Stope Shapes and Create Sub Stope Shapes.

  4. Expand Sub Stope Method and choose Polygon Sub-Stope Shapes.

  5. Select the Sub Stope Shape Type. This is the type of element expressed in the table below and can be:

    • Fraction – Ranges are set as percentages of tube size.

    • Size – Ranges defined in absolute length or height (for example. meters).

  6. Populate the table below to define how cutoff grade is adjusted for each polygon or segment within the stope.

    To define a polygonal shape:

    1. Click into the Points cell to display the Polygon Points popup.

    2. Edit the first row U and V coordinates for the first polygonal point in the local framework coordinate system. Values must be between 0 and 1.

    3. Click + to add a new row to the points table.

    4. Repeat the previous 2 steps to define your polygonal shape.

    5. Click the X to return to the Advanced screen.

    6. Save your settings and continue defining Advanced stoping settings.

Note: Substoping methods are mutually exclusive. You can't use a combination of methods for the optimization run, but you may want to consider cloning your scenario, then changing the method to see the impact on output shapes.

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