This command uses before and after grid files to report blast volumes, swell and cast to final. Before running this command, you need four grid files and an inclusion perimeter. The inclusion perimeter is a closed polyline that follows the back of the cut area and the toe of the previous spoil pile. The first grid file is the original ground surface before the blast. The second grid file is the ground surface after the blast. The third grid file represents the bottom of the pit (design, or bottom of ore). For example, if you are blasting down to the top of ore, this grid should be the top of ore surface. The fourth grid defines the final pit surface including the final cut and spoil pile. This final grid can be created with the Make 3D Grid File command using 3D polylines for the toe of the highwall, toe of the spoil pile and top of the spoil pile.
The program calculates the volume between the original ground grid and the pit bottom grid within the inclusion perimeter. This volume is reported as the Original Volume. The After Blast Volume is the volume between the final ground grid and the pit bottom grid. The difference between the After Blast Volume and Original Volume is reported as the Swell Factor. The After Blast volume that is below the final pit surface is the Cast to Final volume.
Cast Blast Report:
Original Surface: C:\scad\DATA\ex_gnd.grd
Final Surface : C:\scadv\DATA\final.grd
Pit Bottom : C:\scad\DATA\coal.grd
Final Spoil : C:\scad\DATA\spoil.grd
Lower left grid corner : 509141.84,595450.20
Upper right grid corner: 511087.39,596727.09
X grid resolution: 100, Y grid resolution: 100
X grid cell size: 19.46, Y grid cell size: 12.77
Original Volume: 1602319.50 C.F., 59345.17 C.Y.
After Blast Volume: 2066992.20 C.F., 76555.27 C.Y.
Blast Swell Factor: 1.29
Cast to Final Volume: 144689.22 C.F., 5358.86 C.Y.
Cast to Final: 9.03%
Original Surface Grid File
Final Surface Grid File
Pit Bottom Grid File
Final Spoil Grid File
Select the Inclusion perimeter polylines.
Select objects: pick a closed polyline
Pulldown Menu Location: Surface, Blast Pattern
Keyboard Command: blastinfo
Prerequisite: Original, final, pit and spoil grid files.
Inclusion perimeter polyline.