Default Pit Attributes

When timing the pits, there are additional attributes that will be calculated and reported in addition to the Non-Key and Key quantities. If these are defaults that should be applied to all the pits, then they should be entered here. It creates a PTA file which may be specified in the Mining Project Manager. Any quality values, density, or difficulty attributes can be defined here either just as a value, or as a grid file with varying values. The Default Pit Attributes window shows what is defined for defaults, the second window, Reserved Attribute Names, displays the reserved words that will be recognized in the timing routines, and how they should be entered in. Selecting Keywords Help brings up the Reserved Attribute Names. Save and Load will create and load the PTA file for future use.

THICKNESS: Key strata thickness: Will report any other thickness values, this is used mostly for underground timing.
DENSITY: Key strata density: Will report Key density, is used mostly in underground timing to calculate the tons. In surface timing, the tons are already in the pits.
ROCKTHICK: Non-key strata thickness: Reports the Non-Key thickness mostly for underground timing.
ROCKDENS: Non-key strata density: Reports the Non-Key density mostly for underground timing.
TIMEGRID: User-defined grid to use for timing: This will be any additional grid the user would like to add for reporting.
DIFICULTY: Difficulty factor on advance just for underground timing: This will alter the underground equipment rate on advance.
RET_DIFF: Difficulty factor on retreat for underground timing: This will alter the underground equipment rate on retreat.
DIFF_BENCH*: Difficulty factor for bench * for surface timing: This will speed up or slow down the equipment as it mines the specified bench. If a value is above 1, such as 1.2, then it will mine 20% slower at that point in the grid, or everywhere if it is set to value. If it is less than 1, such as 0.84, then it will mine 16% faster at that point.
XXXX_BENCH*: This is the dominate attribute that is most widely used in this command for surface pits. All quality grids will be defined in this fashion, for each bench. The example above, BTU_BENCH1, is defined in this way. All quality parameters need to be entered as the NAME_BENCH*.

Pulldown Menu Location: Boundary
Keyboard Command: editpitattr
Related Commands: Edit Pit, Mining Project Manager