Use Variable Sub-Stope Shapes

This method of sub-stoping divides stopes dynamically using a custom table based on U/V range, cutoff scaling, or shape characteristics.

This method is ideal for irregular zones or when shape behaviour changes with stope position. An example of this is where you want to apply a higher cutoff in the centre and lower near edges of a stope.

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

Activity steps

Define your MSO scenario, block model, economics, orientation and shapes.
Display the Advanced screen.
Check Stope Layout >> Create Full Stope Shapes and Create Sub Stope Shapes.
Expand Sub Stope Method and choose Variable Sub Stope Shapes.
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).
Populate the table below to defines the spatial ranges for sub-stope creation:
- U / V Range – Define the Minimum and Maximum U and V values for sub-stoping.
- Cutoff Scaling Multiplier / Adjustment – Enter a factor to define how cutoff grade is multiplied or adjusted.
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.