Granny Smith Mine (GSM) is an underground gold mining operation located 740km northeast of Perth, Western Australia. Our people fly to site on a chartered jet departing Perth Airport’s Terminal 2 four days a week to Laverton with a travel time of around 85 minutes, or via road for employees residing in host community towns including Laverton and Kalgoorlie.

Wallaby is the operation’s active mine, with mining administration and maintenance located nearby. Ore is processed at the Granny Smith Carbon-in-pulp (CIP) processing plant under campaign milling conditions and is located 12km east of the Wallaby underground mine.

Camp Life

Village rooms are all fully contained ensuite, with Foxtel, 4G WIFI and Telstra phone coverage available. There are well-equipped recreational facilities, including a swimming pool, gym, two squash courts, two multi-use sports courts (tennis, basketball, indoor soccer/cricket), golf practice driving nets, pool and table-tennis tables and lawned gazebo area for special functions.

An active Social Committee organises a variety of events throughout the year, including family visits over Christmas.

The Gold Lounge is a dedicated area for relaxation and socialising, where residents can watch a movie or catch up with others in a quiet and comfortable setting.

A soundproof music room is available for camp residents to enjoy their instrument solo or get together with others to enjoy a jam session. Bring your own instruments or use Gold Fields’ provided equipment.

The site Health and Wellness Officer coordinates group activities and classes including CrossFit, yoga, boxing, mixed netball and soccer.

The recently refurbished tavern is located adjacent to the camp’s dining facilities and provides ATM facilities. The nearby village convenience store stocks an array of items including the newspaper Monday – Thursday and offers a barista coffee service.

Mining Operations

The Wallaby deposit was discovered in 1998, 12km west of the Granny Smith pit, with first open pit ore delivered to the mill in November 2001. The Wallaby open pit was mined from October 2001 until December 2006 and produced 1.5 million ounces of gold.

Underground mining at Wallaby commenced in December 2005 and is ongoing, with a mine life expectancy of ten years. Access to the Wallaby underground mine is via a portal established within the completed Wallaby open pit. The mine operation is trackless, with underground truck haulage via the pit ramp to the surface.

Two primary underground mining methods are used, with minor adjustments to suit localised geometry; Inclined room and pillar (IRP) is used in areas with a moderate dip (10° to 35°) and moderate width zones (four to six metres), and transverse long-hole Stoping (TLHS) is used in zones which are thicker (six metres to 15m) with variable dips. Two other mining methods are used to a lesser extent: Narrow vein long-hole stoping may be applied in some areas with the benefit of reduced planned footwall dilution, and bulk long-hole stoping is used in thicker zones (15m plus) under varying dip conditions. In Zone 110 and Z120 paste fill is used to confine extracted stope hanging walls.

Gold Fields acquired 100% of the Granny Smith Gold Mine on 1 October 2013 as part of the purchase of the Yilgarn South operations. The annual production of the Wallaby mine is in-excess of 250,000 ounces per year.

Processing Plant

The Granny Smith processing plant has a capacity of approximately 3.0 million tonnes per annum treating fresh ore from the Wallaby underground mine. The plant consists of a two-stage crushing circuit, a 4MW SAG and 4MW Ball mill (SABC) grinding circuit, gravity recovery including two 40” Knelson concentrators and a Gekko In-line leach reactor, seven Leach and six Carbon in Pulp (CIP) agitated tanks, sulphide tailings retreatment including spirals and regrind tower mill, pressure Zadra elution circuit and a thickened upstream tailings storage facility (TSF).