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    PYBAR at Larvotto’s Hillgrove antimony-gold: restart design notes for mine engineers

    December 25, 2025|

    Reviewed by Tom Sullivan

    First reported on International Mining – News

    30 Second Briefing

    PYBAR Mining Services has mobilised to Larvotto Resources’ 100%-owned Hillgrove antimony-gold project in New South Wales, with underground development now underway. The contractor is preparing access and development drives to reopen historic workings at Hillgrove, a high-grade antimony-gold system previously mined via narrow-vein underground methods. Early development performance, ground conditions and water management in these initial headings will strongly influence the mine’s restart schedule, stope design and the sequencing of future drilling and production levels.

    Technical Brief

    • Narrow-vein antimony-gold geometry implies selective underground methods, tight development profiles and careful dilution control.
    • Reopening a brownfield underground mine will require systematic re-mapping, updated geotechnical domains and revised support standards.
    • Water inflows from old stopes and drives typically demand progressive dewatering, staged pumping and local grouting.
    • Early development performance will directly condition future contract pricing, unit costs and production ramp-up assumptions.

    Our Take

    Hillgrove’s antimony–gold mix stands out in our database, which is dominated by gold-only Australian projects, signalling Larvotto Resources is positioning into a more strategic, critical-mineral niche rather than a pure precious‑metal play.

    New South Wales features heavily in our recent Mining coverage for permitting and restart activity, so underground works at Hillgrove suggest Larvotto is moving quickly to secure a first‑mover advantage in antimony supply from the state.

    Compared with other ‘Projects’ and ‘Contract Award’ items in our coverage, the use of a specialist contractor like PYBAR Mining Services at Hillgrove typically indicates an intent to accelerate development and de‑risk complex historical underground conditions rather than build a large in‑house team early on.

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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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