Coimolache mining company operates the Tantahuatay mine and has planned extract ore, throughout the life of mine, of 5 zones by open pit mining method, that is, the surface mining of economic ore. For this purpose, open pits are designed considering geotechnical parameters, which are inherent to the rock mass quality and ensure the stability of pit slopes. Design parameters are established by sectors and the configuration of double or single bench, bench height, berm length, inter-ramp angle and bench face angle are defined for each sector.
The distribution of open pits throughout the life of mine and these are: Tantahuatay 2 (THY2), Tantahuatay 2 NW extension (THY2 NW Ext. ), Mirador Norte (MN), Mirador Sur (MS), and Cienaga Norte (CN).
Production schedule
The production schedule established over the life of mine (LOM plan) considers the ore production from Tantahuatay 2 (THY2), Tantahuatay Northwest Extension (THY2 NW Ext), Mirador Norte (MN), Mirador Sur (MS), and Cienaga Norte (CN).
The strip ratio of the LOM plan is 0.34, i.e., on average over the life of the mine 0.34 tons of waste rock will be mined to expose and extract one ton of ore.
Reported ore reserves total 65.45 Mt with an average grade of 0.30 g/t Au and 8.42 g/t Ag. On the other hand, the reported waste will total 22.03 Mt. The LOM mining plan will be developed over a period of 6 years.
A total of 469.8 koz Au and 3,054.9 koz Ag are planned to be pr ........
