The Renison Tin Mine (Renison) is located approximately 15km north-east of Zeehan on Tasmania’s west coast. Renison is a world-class, long life underground mining operation producing tin concentrate.
The Renison mine predominantly applies up-hole benching and open stoping mining methods with (in some cases), post fill and cemented rock fill to fill voids as much as possible. A slurry type fill is planned to be used to backfill a portion of the stope voids of the high-grade wide ore zone in Area 5.
A mining dilution of 5% to 15% at zero grade is used to estimate the Ore Reserve. Minimum widths for underground development are 5 m and for stoping minimum widths are 3 m.
Mining recoveries vary depending upon the stopes physical shape, geological setting and size between 75% and 98%.
Area 5 Expansion
Renison mine production stabilises at approximately 930,000 tonnes per annum (tpa) after an initial ramp-up from approximately 900,000 tpa, with production rate limited by stope production scheduling and underground asset capacity. Over the 10 year mine life, Area 5 contributes approximately 40% of total contained tin in mine production.
Area 5 Mine Design
Renison staff selected mine design is based on a stope size of approximately 15 m x 15 m, and vertical stope height of 40 m. Hangingwall exposures have been minimised by creating vertical walls across the orebody (where required).
Long hole stoping with en ........