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    Tahmoor Colliery sale: restart staging and ground control checks for engineers

    October 9, 2026|

    Reviewed by Joe Ashwell

    Tahmoor Colliery sale: restart staging and ground control checks for engineers

    First reported on Australian Mining

    30 Second Briefing

    Completion of the Tahmoor Colliery sale in New South Wales to the GEAR/M Resources Consortium moves the underground coking coal mine closer to full restart, with about 150 workers already back on site undertaking initial mining activities. The new operator plans a staged ramp-up, progressively recalling additional personnel and recommissioning equipment to restore longwall production. Geotechnical and operational teams will be focused on revalidating ground control, ventilation and gas management systems after the shutdown period before returning to full output.

    Technical Brief

    • Reopening an underground coal mine after care-and-maintenance typically mandates fresh gas, ventilation and spontaneous combustion risk assessments.
    • Ground support standards and trigger action response plans for strata hazards must be revalidated before any longwall retreat.
    • Workforce re-entry at scale will need refreshed inductions, site-specific hazard awareness and emergency escape training.
    • Legacy plant recommissioning demands isolation verification, guarding checks and functional testing of all critical safety systems.

    Our Take

    The related June 2026 coverage confirms Tahmoor as an underground coal operation, so the return of around 150 workers implies a relatively advanced restart phase rather than early care-and-maintenance staffing levels.

    With Tahmoor Colliery in New South Wales now under GEAR and the M Resources consortium, our database shows both names increasingly associated with Australian coal assets, signalling a strategy of consolidating established operations rather than greenfield development.

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    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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