The panel attributes are used in timing calculations and reporting to define coal quantities and qualities within the panel. Any attributes assigned to panel are included in the timing report. The list of attribute names and values is attached to the panel perimeter polyline. There is a number of predefined attributes:
Attribute Defaults to Meaning
THICKNESS 6ft Coal seam thickness
DENSITY 80lb/sq.ft. Coal density
ROCKTHICK 0ft Rock parting or rock to mine
ROCKDENS 150lb/sq.ft. Rock density
The Attribute Groups are accessed in the Timing Project Manager. These and other attributes may be defined and assigned a value to be used as the default. The attributes with no value assigned will be shown in Edit Panel Attributes dialog for the particular panel, but will not be used in the production report.
In order to improve precision of thickness and attribute calculations for the strata, the option is available to specify a grid file name instead of the average value. This allows the program to calculate the desired value on-the-fly based on the calculated perimeter. To use a grid, click on the attribute to change, then select "Grid" in the Value/Grid popup. Then either type the grid file name or select it using the File Select button and store the change using the Update button. Excessive use of grids in calculations will slow down your computations, so use judgment whenever it is necessary to select grids over value.
In order to make the assignment of the Difficulty Factor (to adjust equipment production rate) easier for large number of panels, the attribute named DIFFICULTY may be used instead of modifying every panel data. The corresponding name for retreat mining is RET_DIFF. Both grid and value attribute types are permitted.
These attributes are also used in Quantities by Average and Quantities by Grid functions to calculate qualities associated with the panels.
When you select Keywords Help the following dialog with keyword definitions pops up.
Pulldown Menu Location: Underground
Keyboard Command: editpattr