Client: Codelco, North Division
Location: Antofagasta, II Region, Chile

The refortification work carried out to repair the cavern consisted of drilling and placing helical bolts, placing Norwegian frames around the perimeter of the cavern, preparing and placing shotcrete with fiber with robotic equipment, drilling and placing a 4-inch stram. cables each, injected with cement grout and tensioning acceptance procedure. Electro-hydraulic jumbo jets, DTH and wagon drill, pneumatic and hydraulic drilling equipment were used in the drilling.