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Extending Tanami’s Mine Life
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Tanami Desert, Northern Territory
In the desert of the Northern Territory of Australia, mine leaders at Newmont’s Tanami operation have been investigating opportunities to extend the mine life to 2020 and beyond.
Located at Dead Bullock Soak, production is from the Callie mine which had 2 million ounces in gold reserves at 2010 year end. Callie is about 1,500 yards (1.4 kilometers) deep and has been mined using sublevel open stoping with cemented aggregate fill. Drilling results indicate there is potential to continue mining farther down, but existing infrastructure is aging and costs are increasing.
Through the Tanami Operations Optimisation Project, Newmont is investigating several options, including an on-site paste plant that will allow existing stopes on the higher levels to be backfilled and the remaining ore mined.
The team also is assessing the feasibility of building a 1.4-kilometer shaft to transport mined ore to the surface. The shaft would make it more economic to continue mining beyond the existing 1.4-kilometer depth.
Additionally, Newmont has invested $110 million to upgrade the Granites accommodation village, replace the ball mill, complete the paste plant and other improvement projects.
September 6, 2011