SHAFT SINKING
beyond the current resource boundary , potentially accessible via the shaft .
In the most recent June quarter results update , OZ Minerals said all shaft pre-sink equipment for the Wira shaft mine expansion was on site with pre-sink works planned to commence shortly upon completion of additional temporary structural support for these activities . Delivery of the main sink stage and winders is planned for the December quarter of 2022 , with installation and commissioning activity in the March quarter of 2023 , representing a slight delay due to supply chain constraints .
Redpath to sink at Island Gold
Redpath Mining , a Canada-based subsidiary of the Redpath Group , is set to carry out shaft sinking work on Alamos Gold ’ s Island gold mine in Ontario , Canada .
Having been upgraded from a 2,000 t / d operation to a 2,400 t / d operation with the release of the results of a Phase 3 + Expansion Study earlier this year , the Island
As of August , shaft pre-sink work had commenced at Alamos ’ Island Gold III expansion project timeline was confirmed as having shaft sinking completed by mid-2025 , ahead of the underground ore and waste handling system being completed and shaft hoisting fully commissioned in 2026 .
A 5-m diameter concrete lined shaft will be constructed with a steel head frame , with the shaft housing two 12-t skips in dedicated compartments for ore and waste movement , and a double-deck service cage for the transport of personnel and materials .
The shaft will be sunk to an initial depth of 1,373 m , but the hoisting plant is designed for an ultimate depth of 2,000 m providing flexibility to accommodate future exploration success . At the initial depth of 1,373 m , the shaft has a capacity of 4,500 t / d , more than sufficient to accommodate the peak mining rates of 3,600 t / d ( ore and waste ).
A conventional blind sink methodology will be used providing improved schedule reliability with minimal impact on existing operations , according to Alamos . The underground ore and waste handling and loading pocket will be a
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