Subsurface Blast & Waste Ratios
The below tables contains information about paydirt to waste ratios, as well as blast penalties for too much or too little anfo being used.
Material Value | Optimal Blast Waste To Pay |
---|---|
< $50 / 1k | .8 WTP |
$50 - $249 / 1k | 1 WTP |
$250 - $499 / 1k | 1.2 WTP |
$500 - $999 / 1k | 2 WTP |
$1000 - $4999 / 1k | 2.5 WTP |
$5000 - $9999 / 1k | 5 WTP |
$10k - $24.99k / 1k | 7.5 WTP |
$25k - $49.99k / 1k | 8 WTP |
$50k - $99.99k / 1k | 25 WTP |
$100k + / 1k | 50 WTP |
Blast Over/Under Percentage | Penalty |
---|---|
90 - 98% of Optimum | Slight Underblast. Paydirt reduced by 10% from Optimum. |
75-89% of Optimum | Moderate Underblast. Paydirt reduced by 25% from Optimum. |
< 75% of Optimum | Severe Underblast. Paydirt reduced by 50% plus from Optimum. |
102 - 110% of Optimum | Slight Overblast. Waste increased by 10% from Optimum. |
110 - 125% of Optimum | Moderate Overblast. Waste increased by 25% from Optimum. |
125+% of Optimum | Severe Overblast. Waste increased by 50% + from Optimum. |