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<< Click to Display Table of Contents >> Creating a Staged Excavation for Strip 3 |
  
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<< Click to Display Table of Contents >> Creating a Staged Excavation for Strip 3 |
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Strips 3 and 4 must have Excavation Templates set up for Staged Excavation. This topic covers the setup of the Excavation Template for Strip 3. As described in the initial topic, Setting up a Two Strip operation, Strip 3 is at the state where the upper passes, Ate and Boreas, have been stripped and the Chione pass is in situ. So we require an Excavation Template to excavate the Chione waste and coal.
The Chione waste pass will be taken in 10 m lifts with lifts offset from the lower surface of pass (Chione roof). For further information on the setup of lifts see the topic Setting up Excavation Lifts and Passes.
As this is the first Excavation Template set up, there will be no specific Material Logs for the waste material and coal being excavated. These Material Logs must be set up as part of the Excavation Templates setup process.
Note that as this file contains a north Pit and South pit each with its own geological model the coal seam names for the Chione seam for the south pit are:
•Chione Roof
•Chione Floor
The steps involved in setting up an Excavation Template for Strip 3 are:
1.Open up a Terrain Window for the Strip 3 Pit Shell surface. Draw a Surface Feature around the end wall and high wall crests for this strip. Copy this surface feature and paste it into a Terrain Window displaying the topography. This will provide a feature line delineating the extent of the excavation for Strip 3 on the high wall and end wall sides. The file already contains toe lines for each strip so the low wall toe already exists as a surface feature. These features will be required when we draw a constraining polygon for the Excavation Template.
2.Open the Excavation Settings dialog.
3.Create a new Excavation Template for Strip 3, nominate a Pit Shell and Strip number.
4.On the Staging page of the Excavation Settings dialog check the Used Stage Excavation checkbox to initiate the Staged Excavation.
5.In the Define Passes group select the Surfaces to be used in the Staged Excavation. Strip 3 is currently excavated to the Boreas floor level. As we are only taking Chione waste and coal the Surfaces required are Boreas Floor,Chione Roof and Chione Floor. As all waste and coal above the Boreas floor level is already excavated including the Boreas floor is not strictly necessary. However, if 3d-DigPlus finds even a small volume of material above the Boreas floor it will create lifts to excavate this material. Including the Boreas floor in the list of Pass Surfaces ensures that any such spurious lifts created can easily be identified and ignored when creating Subsequences from the Raw Sequence.
6.Click on set Parameters button to open the Excavate Pass Parameters dialog.
7.Click on the Change Logs button to open the Change Logs dialog. In the Change Logs dialog click on the Create/Attach Pass Logs button. This will create new Material Logs for each pass bearing the name of the floor surface of the pass. This name can be overwritten but it is recommended to leave it as default to minimise the possibility of errors.
8.Make sure that Chione Roof North pass is selected in the Pass Name pulldown list. Select the option for Multiple Lifts, set the Bench Height for Lifts to 10 m, select the option Offset Benches From a Surface and select the Shape for Offset Benches option Lower Surface of Pass. In the Lift Naming This Pass group Use Lift Level or Offset. This will result in the Lift names bearing Offset distance from the bench surface. See Lift Naming Rules
9.With the above setup complete click the Create Raw Sequence button to create the Raw Sequence and complete the Stage Excavation Set up.
The following video clip demonstrates the set up of the Excavation Template for Strip 3
3d-DigPlus must be in Auto mode after the tutorial file is loaded:
Simulation Pulldown - Auto Mode
Load the File Topic1_Complete, when the exercise is complete save the 3d-DigPlus file under the name: Topic2_Complete.3dd
When these tasks are complete saved the 3d-DigPlus file under the name:
Topic2_Complete.3dd
Automated Excavation Sequencing
Setting up Excavation Lifts and Passes