Mt Lyell copper–gold mine restart: geotechnical and rehab priorities for engineers
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
The Mt Lyell copper–gold mine on Tasmania’s west coast has secured key approvals to restart after nearly 10 years in care and maintenance, with operator Sibanye-Stillwater planning to bring the historic underground operation back into production. The brownfields restart is expected to generate about 300 local jobs and re-establish Mt Lyell as a significant sulphide copper–gold producer in Australia. For geotechnical and mining teams, the approval signals renewed demand for underground rehabilitation, ground support upgrades and modernised tailings and water management on a legacy site.
Technical Brief
- Regulatory conditions are expected to mandate upgraded emergency egress, refuge chambers and modern communications in legacy workings.
- Brownfields restart on a century‑old mine implies systematic re‑assessment of historical ground support and pillar stability.
- Long‑term care and maintenance will have altered groundwater regimes, requiring updated hydrogeological modelling and inflow management.
- Legacy tailings facilities will face contemporary stability, seepage and water‑quality compliance checks before any capacity changes.
- Recommissioning of old shafts, declines and hoisting systems will trigger fresh mechanical and shaft‑lining integrity inspections.
- Workforce ramp‑up of several hundred personnel necessitates renewed safety training, induction and contractor management systems.
Our Take
Sibanye-Stillwater’s decision to allocate 2026 capex to the Mt Lyell copper-gold restart, alongside Burnstone in South Africa, signals that Tasmania is being treated as a core growth node in its diversified copper–gold pipeline rather than a peripheral option.
With Mt Lyell emerging from almost a decade of care and maintenance and tagged under ‘Safety’, the recent fatal incident at Sibanye-Stillwater’s Kloof gold mine underscores that regulators and communities on Tasmania’s west coast are likely to scrutinise shaft access, ground control and emergency egress standards particularly closely.
In our database of 1302 Mining stories, copper–gold projects like Mt Lyell are increasingly framed around job creation and regional revitalisation, and the 300 expected roles here will give local stakeholders significant leverage in negotiations over conditions and long-term social licence on Tasmania’s west coast.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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