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2014WinShotcreteEMag

2013 Outstanding International Project Cadia East Project By Stephen Duffield TAustralia and one of the largest underground to break the rock and propagate mining vertically.Panel caving is a natural caving method whichuses ground stresses, rock structures, and gravityhe Cadia East Project is delivering what willbecome the largest underground mine in gold mines in the world (Cadia East). Fiber- Cadia East is planned to have two panel caves reinforced shotcrete has been essential for the safe with extraction levels situated at 4000 and 4600 ft development of this world-class project. (1200 and 1400 m) below the surface. Panel Cave Cadia East is the latest mine to be developed 1 commenced commercial production in January at Newcrest Mining Limited’s Cadia Valley 2013, and the development of Panel Cave 2 is Operations (CVO), situated approximately 160 underway. Cadia East is expected to ramp up to miles (260 km) west of Sydney, in New South full production of 28.7 million U.S. tons per Wales, Australia. Newcrest Mining Limited annum (26 MTPA) over the coming years. (Newcrest) is the largest gold producer listed on These significant mining depths, along with the Australian Stock Exchange and one of the induced stresses, the forecast deformation, and world’s largest gold mining companies. the blocky nature of the rock mass, are all factors Cadia East has an approved mine life of 21 years that drive the need for high-quality and high- and is forecast to increase CVO’s annual production capacity shotcrete application at Cadia East. to 700,000 to 800,000 oz (20,000 to 23,000 kg) of The Cadia East Project commenced the main gold and 99,000 tons (90,000 tonnes) of copper in shotcreting segment of the underground develop- the coming years. In the financial year ending June ment in June 2010 and has excavated 37 miles 2013, CVO produced 446,879 oz (12,669 kg) of (59 km) of tunnels as of the end of November gold and 59,440 tons (53,912 tonnes) of copper. 2013. The majority of project development will be finalized by December 2014. Caving at Cadia East The massive underground gold and copper Cadia East Mine Development resource at Cadia East is suited to the low-cost, bulk A total of 37 miles (59 km) of underground underground mining method known as panel caving. tunnels have been excavated for the Cadia East Fig. 2: Jumbo drill rig installing rockbolts Fig. 1: Newcrest Mining Limited operating mines and advanced projects through shotcrete 16 Shotcrete • Winter 2014


2014WinShotcreteEMag
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