Lomas Bayas Copper Mine, Chile. The Lomas Bayas copper mine is in the Atacama Desert of north Chile in the San Cristobal mountains. The mine is at an el. P&H has also supplied a 100XP blasthole drill to Lomas Bayas. Open-pit mining at Lomas Bayas. A P&H 2800XPB electric mining shovel, as used at Lomas Bayas. The Fortuna de Cobre copper prospect.