Multi Bench Design

You can use MULTI BENCH DESIGN to create a maximum of 50 bench lifts using one form in Surpac. You can define properties of the benches with this function. These properties include: expansion method, slope angle, bench height, and Z target.

To run this function: Choose Design > Expand segment > Multi bench design, or...

In the Function Chooser, type MULTI BENCH DESIGN, and press ENTER.

Fields on the Multi bench design form

Field	Description
String	The string number of the selected segment.
Segment	The segment number of the selected segment.
Minimum Z value	The minimum Z value of the selected segment.
Maximum Z value	The maximum Z value of the selected segment.
Horizontal direction	Expand: The segment is expanded to create the new segment. Contract: The segment is contracted to create the new segment.
Define slope & berm method	The method used to obtain slope angle and berm width. Options are: Fixed values: Slope angle and berm width are entered manually. This is the default setting. Block model: Slope angle and berm width are taken from the block model. If you select this method, you must select the slope angle attribute and berm width attribute on this form. This option is only available when a block model is connected.
Berm gradient	The cross fall gradient, as a percentage, to ensure appropriate drainage on the berm. A positive value causes an increase in elevation, and a negative value causes a decrease in elevation.
Define attributes for slope angle & berm width
Slope angle attribute	The attribute, in the block model, that contains the slope angle.
Berm width attribute	The attribute, in the block model, that contains the berm width.
Bench list details
Expand method	The expansion method for the bench. Options are: by height : The segment is expanded by a set elevation. This is the default setting. to elevation: The segment is expanded to a maximum elevation. to DTM: The segment is expanded to a surface.
Slope angle	The slope angle for the bench. This option is available only if you have selected Fixed values in the Define slope & berm width method field.
Bench height	The bench height to project the segment to.
Target Z	The elevation the segment is projected to.
DTM filename	The filename for the DTM the segment is being expanded to. This field is available only if you have selected to DTM in the Expand method field.
Object	The object number of the DTM that the segment is being expanded to. This field is available only if you have selected to DTM in the Expand method field.
Trisolation	The trisolation number of the DTM that the segment is being expanded to. This field is available only if you have selected to DTM in the Expand method field.
Berm	Selected: The berm is applied. If you select this check box, the Berm width, Berm creation method, and Berm Z limit fields become active. Cleared: The berm is not applied. This is the default setting.
Berm width	The width of the berm.
Berm creation method	The method used to create the berm. You can create a berm that is the same width along the full length of the segment, or is the required width only where the difference in elevation from the point on the segment to the target elevation meets a specific criteria.
Berm Z limit	The maximum Z value for the berm. This is required when you have chosen a berm creation method that relies on a difference in segment and target elevation.
Delta Z limit	The value for the difference in elevation between the segment and the target elevation. This is required when you have chosen a berm creation method that relies on a difference in segment and target elevation.
Bench list filename	The parameters you have entered for the benches can be saved to a comma separated value file with the extension .bls.
Load	Loads the bench list specifications to a .bls file.
Save	Saves the bench list specifications to a .bls file.

Output

A pit design is created with the slope and berm width parameters you have defined.

Troubleshooting

Message	Description
Slope angle is not numeric	The slope angle must be a numeric value, it cannot include letters or symbols.
Slope angle cannot be blank	The slope angle must be defined by a numeric value.
Bench height is not numeric	The bench height must be a numeric value. It cannot include letters or symbols.
Bench height cannot be blank	The bench height must be defined by a numeric value.
Berm frequency is not numeric	The berm frequency must be a numeric value. It cannot include letters or symbols.
Berm frequency cannot be blank	The berm frequency must be defined by a numeric value.
Berm width is not numeric	The berm width must be a numeric value. It cannot include letters or symbols.
Berm width cannot be blank	The berm width must be defined by a numeric value.