Apply Digitizer Boundary

To access this screen:

Digitize a Pushback Adjustment, Slope Region or Pit Limit boundary using the Optimization ribbon's Regions group.
Complete digitizing and a variation of the Apply Digitizer Boundary screen is shown.

Region perimeters (outlines, boundaries) that serve a common purpose (e.g. Pit Limits, 2D Slope Regions and Pushback Adjustments) are grouped in 3D Objects.

The objects and the component regions are identified by word labels (names). You can create any number of objects of any given type and these will be available to all case studies of the project.

The regions have attributes that vary with the parent object type; for example the regions in the Pit Limits object have a type and bench limit or removal cost. When you see this screen, the object type is known and you set the region attributes specific to this type.

Pit Limits & Pushback Adjustments

Pit Limits is a Region type, and you can have only one region of the type Pit Limit Include.

Similarly, Pushback Adjustments, another type, can have only one region of the type PB Include or PB Forced Limits.

Note: When generating the Ultimate Pit with the Use pit shell selected from the list below option, Pit Limit Include and Pit Limit Exclude region types apply only to LG phases, not the Ultimate Pit shell.

Regions types are available as follows:

Pit Limit Include – The pit shell cannot extend beyond this bench and beyond the region.
Pit Limit Exclude – The exclusion zone starts at this bench, mining above this bench is allowed.
Obstacle Limit – Regions that can be removed at a cost only in their entirety or not at all.
PB Include – A pushback adjustment restricting the pushback to be contained completely within the boundary. The pushback cannot extend below the defined limiting bench, for example:
PB Forced Limit – A pushback adjustment forcing all blocks within the outline to be included within the pushback. The pushback cannot extend below the limiting bench. The boundary size will overwrite the control variable Value if this adjustment is selected for a pushback in the Pushback Size Control panel, for example:
PB Local Elevation Limit – A pushback adjustment restricting the pushback depth for the blocks within the outline; the pushback portion within the perimeter cannot extend beyond this bench, for example:
PB Local Include – A pushback adjustment forcing all blocks within the outline to be included in the pushback. Note that all blocks within unconstrained pushbacks are also included in the selected pushback:
PB Exclude – A pushback adjustment allowing no blocks within the outline to be contained within the selected pushback, for example:

Activity steps:

Display the 3D window.
Display appropriate reference data, for example, a geological model.
Digitize a boundary string of the appropriate type using Regions tools found on the Optimization ribbon.
Click Done to complete the design of a closed polygon.
A boundary information screen displays (its title depends on the type of outline you created).
Choose how data is to be added to your case study:
- Add boundary to selected object or Edit boundary properties – Choose one of these if you are adding a region to an existing object or editing region properties.
- Add boundary to new object – Select this option to start building a new object and enter a New object name.
  
  Note: If an object with this name already exists, you are asked to modify the name as object names must be unique.
Choose a Region type. If applicable, select the type from the list.

See Pit Limits & Pushback Adjustments.

Note: One boundary file may contain several Pit Limits or Pushback Adjustments regions.
If appropriate, define a Limiting bench for the region type.
Enter a Removal cost for Pit Limits obstacle removal costs only. Enter the dollar cost.
If appropriate, enter the Number of benches to match pit design. This is only applicable for Forced Limit or Local Include region types with a custom (designed or smoothed) ultimate pit. It might be needed when pushback walls are sufficiently close to pit wall and the overall slope angle compared to the designed face angles of the pit would normally cause blocks to be excluded from the pushback OES.
Click OK to complete formation of the region.