project

Sulphide ore

Oxidized ore

Cu (copper)

Pb (lead)

Zn (zinc)

Cu (copper)

Pb (lead)

Zn (zinc)

Boundary grade (ωB)%

0.2 to 0.3

0.3 to 0.5

0.5 to 1

0.5

0.5 to 1

1.5~2

Minimum industrial grade (ωB)%

0.4 to 0.5

0.7 to 1

1 to 2

0.7

1.5~2

3 to 6

Average grade of the deposit (ωB)%

0.7 to 1

6

6

10~12

10~12

Minimum recoverable thickness m

1 to 2

1 to 2

1 to 2

1

1 to 2

1 to 2

Stone removal thickness m

2 to 4

2 to 4

2 to 4

2

2 to 4

2 to 4