Project Information: Primary crusher and conveyor belt transportation tunnel. Length of 2 km. Tunnel section 35.08 m² with width extensions every 200 m. The mine area is at 3,600 m above sea level, resulting in snowed areas. The mine deposit at Toquepala contains copper and molybdenum. Rocks with predominant RMR (Rock Mass Rating) of between 30 and 40. Extension of tunnel secondary section of 160 ml underpass industrial railway of 60 ml and rectangular 8×4. 62,000 m3 of tunnel excavation. 250,000 m3 of portal excavation. 7,000 m of 1” diameterhelical bolts L=10’. 470 HEB trusses 160. 30 cm gunite thickness.
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