Export String to Talpac road file
TALPAC is a Truck and Loader fleet planning program developed and distributed by Runge Mining. The Talpac Interface function will convert a string into the format required by TALPAC to define the centreline of a haul road so that a fleet planning study may be performed.
To run this function: Choose File > Export > String to Talpac road file, or...
The centre line string must define the path from the truck load point to the truck dump point, and the return route if a different path is required. Define the path in a single segment of a string by digitising from a map or by selecting points in the GRAPHICS module. Alternatively various design tools in the GRAPHICS module may be used to describe the path. It is essential that the centre line string define the haul road path in all three dimensions as haul road gradients are required so that TALPAC can perform a fleet simulation.
The centre line string (only the first segment of the string is used) is reduced to a number of segments each of which has a known length and gradient. For each of these centre line segments various other parameters must be defined. These parameters include the Rolling Resistance, Maximum Velocity, Final Velocity and the Truck Load. These parameters must be entered via the keyboard.
Define the ramp centre line string
Location, ID number and String
Enter the Location, Id number and String number to define which string is to be used as the centre line of the haul road for the TALPAC simulation.
Only the first segment of this string will be used. If more than one segment exists in this string then the second and subsequent segments will be ignored.
Define the TALPAC filename and parameters
Filename
Enter the name of the TALPAC file which will be created to contain the haul road profile details. An extension of `.hrp' is automatically appended to any file name which you enter. This is a requirement of TALPAC.
Title
Enter a title which describes the purpose of this centre line and simulation exercise. This is used by TALPAC to title any reports which it produces.
Angle tolerance (degrees)
This value is used to reduce the number of haul road segments which are written to the TALPAC `.hrp' file. TALPAC has a limitation on the number of haul road segments which can be processed. If you have many short road segments around curves you may need to increase the Angle tolerance. This tolerance allows you to reduce the total number of segments in the haul road by merging many segments where there is little deviation, into a single segment. The resultant length and average gradient for this combined segment are equal to the total length and average gradient of the combined segments.
Gradient tolerance (%)
This value is used to reduce the number of haul road segments which are written to the TALPAC `.hrp' file. TALPAC has a limitation on the number of haul road segments which can be processed. If you have many short road segments especially around vertical curves you may need to increase the Gradient tolerance. This tolerance allows you to reduce the total number of segments in the haul road by merging many segments were there is little variation in gradient, into a single segment. The resultant length and average gradient for this combined segment are equal to the total length and average gradient of the combined segments.
Complete the TALPAC INTERFACE form and choose Apply to begin processing the specified centre line string. The TALPAC HAUL ROUTE PARAMETERS form is displayed to allow you to enter the various parameters which will influence the fleet planning exercise in TALPAC.
Title
The title entered on the TALPAC INTERFACE form is displayed.
The scrolling region displays details about each segment in the haul road and permits you to enter the parameters for each segment which are required by TALPAC for its simulation.
Section
A counter to help you locate your self along the haul road is displayed.
Start Chainage
This is the starting chainage, that is, the distance from the start of the haul road of each segment in the haul road. The chainage is a slope distance not a horizontal distance. This assists you to locate yourself along the haul road. This value cannot be modified.
Section Length
This is the length of the haul road segment and it is a slope distance not a horizontal distance. This value cannot be modified.
Rolling resistance
The rolling resistance is a factor which defines the frictional forces between the truck and road surface. It is expressed as a percentage of the component of the gross vehicle weight that is normal to the road surface.
Maximum Velocity
This is the maximum velocity allowed within a haul road segment. A value of -1 means the maximum possible velocity of the truck. If working with the metric system the units are kilometres per hour and in an imperial system the units are miles per hour.
Final Velocity
This is the maximum allowable velocity at which the truck may be travelling when it reaches the end of the haul road segment. This is often used to slow a truck down when approaching a dump. A value of -1 means the truck maximum velocity will be used.
Weight Carried
The load weight is expressed as a percentage of the maximum vehicle load capacity. A value of -1 means fully loaded and a value of -2 means the truck is empty.
Complete the TALPAC HAUL ROUTE PARAMETERS form and choose Apply to save the data to the haul route profile (.hrp) file. This file may now be used by TALPAC for a truck and loader fleet study.