This command calculates overburden and strata quantities. The strata thicknesses are defined in coal sections or drillholes. This routine requires a 3D closed polyline with elevations of the top of the seam. This polyline is also used as the perimeter of the pit. The routine calculates a surface model for the top of seam using this 3D polyline. Then a surface model for the ground surface is calculated from the selected surface entities such as points, lines or polylines with elevation (contour polylines). The overburden volume is calculated as the volume between these two surfaces within the 3D polyline. Each strata is modeled and the volume calculated for the area within the 3D polyline.
Coal Section Configuration File
Select the file that defines the coal section sample points.
Pick top of coal polyline: pick the closed
polyline
Choose the .grd file to update.
Select surface entities and at least 3 coal sections or
drillholes.
Select objects: pick the entities
Make Grid File dialog Choose a grid resolution
Beginning date of takeup [format mm-dd-yy] :
6-1-92
Ending date of takeup [format mm-dd-yy] : 6-30-92
These dates used by Report Tons & Acres.
Ownership/description: Jones
This is the name of the data file to be updated for Report Tons
& Acres.
Coal recovery percent <100.0>: 95
Write column report file (Yes/<No>)? press
Enter This option creates a file minearea.dat in the data
directory with the calculated quantities and other information in a
column format.
Input for Vertical Pit
Quantities: coal sections, 3D top of coal perimeter polyline,
surface entities (contour polylines)
VERTICAL PIT WITH GRID METHOD
Individual Stratas Configuration
MINE: Watertown MINED FROM TO
AREA NO. 1 DESCRIPTION: .
AREA MINED (S.F.): 29686.84 DEPLETED ACRES: 0.682
VOLUME Coal: 147959.43 (S.F.), 5479.98 (C.Y.)
AVERAGE Coal THICKNESS (INCHES): 59.81 (FEET): 4.98
VOLUME Rock: 6785.11 (S.F.), 251.30 (C.Y.)
AVERAGE Rock THICKNESS (INCHES): 2.74 (FEET): 0.23
TOTAL MINING HEIGHT (INCHES): 62.55 (FEET): 5.21
AVERAGE Coal WT. (LBS/CU. FT.): 80.00
AVERAGE Rock WT. (LBS/CU. FT.): 120.00
Coal (TONS): 5918.38
Rock (TONS): 407.11
NON-RECOVERABLE COAL (TONS): 0.00 COAL RECOVERY PERCENT:
100.00%
TOTAL TONS : 6325.48 PERCENT COAL BY WGT.: 93.56%
VOLUME OVERBURDEN: 541529.65 (S.F.), 20056.65 (C.Y.)
STRIP RATIO: 3.39
Pulldown Menu Location: Surface
Keyboard Command: vertvol
Prerequisite: Coal sections