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Bench Exits
To access these functions:
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Using the Scheduling Setupdialog, select the Haul Routes icon on the left. Select the Bench Exits tab.
The Bench Exits tab is used to add and delete bench exit nodes; select and save node objects. It is part of a collection of settings used to define haul routes.
Adding a Bench Exit
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Click Add in the Bench Exits tab,
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In the Bench Exits grid, define the required parameters.
The location of the Bench Exit can be entered in terms of its X, Y and Z co-ordinates or it can be read from a Datamine object that has been loaded into the Design window (see below).
At least one Bench Exit point should be defined by its Node ID for every bench that is to be scheduled. It is possible to have multiple Bench Exits on a bench and Studio OP will select the nearest Bench Exit based on:
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The Bench Exit with the shortest distance (allowing for Bench Haul Factor) will be selected if it is within a specified vertical tolerance (default is 5m) of the toe of the Block being mined.
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If there are no exits within the vertical search tolerance then the search will be expanded increasing the vertical tolerance until an exit is found. The additional ramp haulage to get to this Bench Exit is included in the cycle time.
Selecting Existing Bench Exits Points
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Click Select Object
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In the Select Object dialog, select the required node points file.
Please see here for more information on using node point files.
Bench Exits and Pushbacks
At least one bench exit point should be defined by its Node ID for
every bench that is to be scheduled. It is possible to have multiple
Bench Exits on a bench.:
The bench exit with the shortest distance (allowing for Bench Haul
Factor) will be selected if it is within a specified vertical tolerance
(default is 5m) of the toe of the Block being mined.
If there are no exits within the vertical tolerance then the search
will be expanded increasing the vertical tolerance until a bench exit
is found. The additional ramp haulage to get to this bench exit is
included in the cycle time.
The bench exit is only valid if the pushback number for the Block being
scheduled matches the pushback number in the Bench
Exits table. This allows for the fact that bench exits will
be mined out as the pit expands and Bench Exits will only become available
when a pushback commences.
If a bench exit is to be used by blocks that belong to a number of
pushbacks then the bench exit will be repeated for each pushback.
Using a Vertical Search Tolerance
The Vertical search tolerance, for the String Position options shown on the Select Data panel, using a default bench height, can be illustrated as follows:
Using a variable bench height (DPLUS and DMINUS option) can be illustrated as follows:
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Field Details:
Vertical Search tolerance: define a search
radius value (m) to be used when mining blocks are assigned to a bench
exit.
The vertical search tolerance controls the search distance in the Z
direction, relative to the toe of the bench, for the nearest Bench
Exit for the selected Block.
Add: click this button to add a new bench exit.
Delete: click this button to delete the selected bench exit.
Select Object: click this button to select a loaded nodes points file. Displays the Select Object dialog.
Save: click this button to save the nodes.
Pit Exits Table
Node ID: unique Bench Exit node identifier.
Pushback: pushback number.
X Coord: Bench Exit node X coordinate.
Y Coord: Bench Exit node Y coordinate.
Z Coord: Bench Exit node Z coordinate.
