Vertical by Index using Slope Angle
For open pit mining, vertical and horizontal dependencies are created manually based on the block model, bench and stage attributes you have imported as part of a long-term plan.
A Vertical dependency for any block requires that the blocks immediately above it need to be mined before it is considered accessible.
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Before using this tool, ensure that there is no filter set in the Gantt window.
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Set the following parameters in the Build Vertical Dependencies form:
Maximum Slope
Enter a maximum slope angle value (the face angle of the mining blocks). The slope is calculated between task block centroids.
Index attribute
Click on the List icon to select the Index attribute. This attribute acts as a unique block identifier that delineates the location of each block with respect to other blocks.
Group by
If multiple pits are being processed, an expression can be used, for example, to identify the pits in which the mining blocks are located.
If the expression field is blank, dependencies are built for a single group consisting of all tasks. If an expression is specified, the expression is evaluated for each task, and tasks are grouped accordingly. Different Block Size parameters can then be set for each group.
Use the tools on the grid list toolbar to manage the groups in the list.
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Click to Clear all rows. |
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Click to Delete the selected rows. |
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Click the Autofill button to calculate the block sizes in each group based on the block centroids and the Index attribute. If the block size cannot be estimated (e.g. if there are too few blocks), the cell will be left blank and must be filled in manually. |
Build Interstage Dependencies
If stages are used, select this option and define the Stage attribute and the Bench lag.
Limit active benches
When this option is enabled, dependency links are created between each bench, and the nth bench above it, where n is the maximum number of benches that could be mined at any given time.
This option is unavailable when the Build Interstage Dependencies option is selected.
Block Sizes
If the Use Default Block Sizes option is not selected, the Block Sizes grid is enabled, and you can enter the X, Y and Z block size values for each Group.
You can use the tools on the grid list toolbar to manage the groups in the list.
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Click to Clear all rows. |
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|
Click to Delete the selected rows. |
|
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Click the Autofill button to calculate the block sizes in each group based on the block centroids and the Index attribute. If the block size cannot be estimated (e.g. if there are too few blocks), the cell will be left blank and must be filled in manually. |
Use default block sizes
If the Use default block sizes option is selected, the Block Sizes grid is disabled and you can enter the default X, Y and Z value for the blocks in the fields provided.
