Example - Create Phase DTMs Create the DTMs from which phase solids are created

Create Phase DTMs

Studio OP uses "Phase DTMs" within the process of constructing the mining reserve solids. A phase DTM is an open wireframe surface that represents an individual phase within a pit. This could represent a pushback or the state of the pit at a particular time period, for example.

Phase DTMs may already exist, for example if they have been created externally, and can be specified here. Alternatively, the phase DTM can be constructed from string data. This string data may be in the form of contours that have been generated from a strategic model, or they may represent a more detailed pit design that has been created in Studio OP or elsewhere.

In this example, you will use pre-existing phase strings to generate pit shells.

Exercise: Creating Phase DTMs

In this exercise, you are going to define 3 phases within the pit, based on the geometry of 3 corresponding string files ("phase strings") that have been designed to accommodate the same number of pushbacks calculated by NPV Scheduler.

This exercise utilizes the manual method of phase definition. It is also possible (although not demonstrated here) to use an automatic approach where phases are defined according to unique key field values in the planning model.

1. Using the Setup ribbon, select Define | Phases.
2. As your project contains 1 pit, it is automatically selected. Similarly, the first row in the displayed table shows "P1_PH1" as the Name, thus representing "Pit 1, Phase 1". This default description can be changed (but won't be, for the purposes of this example):
   
   
   
   You will be defining your phases using string files later as part of the "Modelling Phases" exercise, so you can ignore the Model Value attribute (it is read-only for the manual mode).
3. Click Add - a new phase is defined; P1_PH2. The default phase name is fine for this tutorial.
4. Click Add again to create the third and final phase - P1_PH3.
5. Save and Close your task.