A mine which is milling 100 000 tons per month changes its policy by increasing development and waste sorting and reducing the stope width while maintaining the tonnage milled. How is the profit per ton affected if: - The development tonnage increased from 8 000 tons at 4.70 g/t to 10 600 tons at the same value? The cost of development rises from R5.50 to R7.50 per ton milled? - Surface sorting is increased from 7% at 0.5 g/t to 14% at 0.3 g/t? - The average stope width is reduced from 110 cm to 106 cm? The breaking costs per m2 increased from R12.00 to R13.75? The original: average stope value 13.20 g/ Mine Call Factor 92% Recovery 97% Price of gold R3 000 per kg II 11 II 11 A mine which is milling 100 000 tons per month changes its policy by increasing development and waste sorting and reducing the stope width while maintaining the tonnage milled. How is the profit per ton affected if: - The development tonnage increased from 8 000 tons at 4.70 g/t to 10 600 tons at the same value? The cost of development rises from R5.50 to R7.50 per ton milled? - Surface sorting is increased from 7% at 0.5 g/t to 14% at 0.3 g/t? - The average stope width is reduced from 110 cm to 106 cm? The breaking costs per m2 increased from R12.00 to R13.75? The original: average stope value 13.20 g/ Mine Call Factor 92% Recovery 97% Price of gold R3 000 per kg II 11 II 11