6
Figure 7. Visual evidence of the decrease in unrecoverable
underbreak in the areas of the bench where the new designed
was used successfully
Figure 8. Schematics of observed improvements in material recovery obtained with alternate design
Table 2. Estimated gains in tons, copper pounds, and extra revenue generated from three average grade scenarios
Parameter
Underbreak
tons lost, to be
recovered with
new design
Potential
recovery if new
design used
Revenue to be
recovered ($)
(@$3.60/lb) using
0.111% grade
(Lower grade
scenario)
Revenue to be
recovered ($)
(@$3.60/lb) using
0.187% grade (Mid
grade scenario)
Revenue to be
recovered ($)
(@$3.60/lb) using
0.255% grade
(Higher grade
scenario)
Net gain from using new
design to recover 71.2%
more tons from walls
270,780 100.0% $2,168,942 $3,637,253 $4,963,780
Figure 7. Visual evidence of the decrease in unrecoverable
underbreak in the areas of the bench where the new designed
was used successfully
Figure 8. Schematics of observed improvements in material recovery obtained with alternate design
Table 2. Estimated gains in tons, copper pounds, and extra revenue generated from three average grade scenarios
Parameter
Underbreak
tons lost, to be
recovered with
new design
Potential
recovery if new
design used
Revenue to be
recovered ($)
(@$3.60/lb) using
0.111% grade
(Lower grade
scenario)
Revenue to be
recovered ($)
(@$3.60/lb) using
0.187% grade (Mid
grade scenario)
Revenue to be
recovered ($)
(@$3.60/lb) using
0.255% grade
(Higher grade
scenario)
Net gain from using new
design to recover 71.2%
more tons from walls
270,780 100.0% $2,168,942 $3,637,253 $4,963,780