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The deposit is accessed by a portal and the decline has a -15% gradient.
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Access to the mine is through two vertical shafts. The 3-compartment shafts are 3 m x 6 m (10 ft x 20 ft). The main levels are spaced every 91 m (300 ft).
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The K-2 Mine has portal access onto a +2% grade main level at the 640 m (2100 ft) elevation, the majority of the ore mined to date has come from above that elevation. The upper portions of the mine are accessed via a 4.2-m (14 ft) wide by 4.5-m (15 ft) high ramp system with a maximum incline of 12%.
The lowest portion, K-2 East, is accessed by -12% ramp system developed from the 640 m (2100 ft) main level.
The adit, internal ramp system, is designed to run parallel to the vein system in the footwall to allow for diamond drilling which defined the ore zones on 15 m (50 ft) centered spacing.
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Kloof complex consists of five (5) surface shafts and eighteen (18) sub-shafts. Some of these shafts are kept only for services and ventilation.
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The Centenary and Strzelecki orebodies are accessible by two ramps from a common portal located in South Pit. The Barkers orebody is also accessed by a ramp developed from the Barkers pit.
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The main access consists in a two compartment, 5.5 m (18 ft) in diameter, circular concrete lined shaft.
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The mine is accessed from the surface by two vertical shafts of 1524 m (5000 ft) with internal shafts that provide hoisting and servicing up to 2438-m (8000 ft) level.
The mine levels are spaced every 46 m (150 ft) except in the upper part where some levels are only 30 m (100 ft) apart.
Two internal main ramps have been developed in order to use mechanized equipment. Secondary satellite ramps are developed for stope mining.
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Access into the mine is via two declines. The Centenary decline was the first of the two, being completed in 1996. The Millennium decline was broken through in 1999.
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Mining operations consist of 13 operational shaft systems covering an area of 120 km² (46 mile²). Each shaft develops and mines about 8 km² (3 mile²).
A cost-effective capital programme to extend the lives of the existing shaft systems and to develop new shafts to enable access to reserves was initiated in 1993. The first phase of this includes the development of a series of five decline shaft systems below the current third generation vertical shafts and a vertical shaft link with No 12 shaft. At present, one decline shaft (10) is in production while four decline projects are in progress (at 1, 11, 12 and 14 shafts) with the main sinking phases at various stages of completion. Two new shaft systems (shafts 16 and 20) are currently under investigation.
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The underground Lotus Deeps zone is accessed from the bottom of the Lotus open pit by a decline with a gradient of 1:7 to access two main orebodies (hanging wall and footwall lodes).
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The orebody is accessed through two declines with its common portal in the open pit.
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Access to the deposit is possible by two ramps.
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An access ramp is developed from the base of the Golden Pig pit giving access to the deposit.
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Access to the deposit and to the stope is possible from two ramps. The ramps are located at a distance of 30 m to 50 m (98 ft to 164 ft) from the deposit. The crosscuts that connect the ramp to the deposit are long enough to accommodate a sump and muck bay.
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The Zone 1A is accessible by the same ramp giving access to the massive deposit. The dip of the ramp is of 1:9. The ramp is distant of approximately 80 m (262 ft) of the zone located in the hanging wall.
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The majority of the orebody is being accessed via a main single ramp with a 1:7 gradient (-14.3%). This decline is designed to provide all access and ore haulage. The main entrance is located on the eastern flank of a 18-m (59 ft) high hill in order to take advantage of the local shallow base of oxidation and to limit environmental impact. The ramp is situated 60 m to 80 m (197 ft to 262 ft) in the footwall. The history of Australian mining operations, since diesel truck haulage has been used, has not seen any shafts installed for such shallow depths. For these reasons, a shaft was not considered for this mine.
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The NO2 Lode is accessed via the first 2.4 km (1.5 miles) of the existing decline (ramp). An additional excavation of 1.8 km (1.11 miles) will be required to cover entirely the lode. The planned NO2 decline is situated 60 m (196 ft) in the footwall.
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