The Tambomayo mining unit uses Transverse Sublevel Stoping (SLS), Bench and Fill (B&F), and Overhand Cut and Fill (OCF) mining to produce approximately 45,000 tons of ore per month (1,500 tpd).
At the operational level, the mine has been divided into four zones:
- 100 (Mirtha);
- 200 (Paola);
- 300 (Paola Norte).
The most important local faults in the zones adjacent to the mineralization zone correspond to Fatima, Carmen, and Norte faults, which have a NW strike and dip in NE direction.
In recent years, up to three underground mining methods have been used:
- Bench & Fill (B&F): 10-meter drill holes with detrital fill in longitudinal stopes.
- Sublevel Stopping (SLS): long holes (the entire pit) with detrital fill, in transverse stopes.
- Overhand Cut and Fill (OCF): Drilling in breasting, leaving a 0.50 m free face at the bottom.
A. Bench & Fill (B&F)
To apply this method, a ramp is built from which infrastructure such as bypass, crosscuts, connections, drifts, ore passes, and loading rooms will be developed.
Every 100 meters in height, starting from the ramp, a 4m x 4m section bypass is built parallel to the vein in the footwall, some 40 meters away from the vein, to serve as transit works for haul trucks and increase the operation’s dynamism.
From the bypass or intermediate sublevels, crosscuts are built with a 3.5 m by 3.5 m section perpendicular to the vein to generate ac ........
