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    Develop’s Woodlawn drilling: 15-year mine life implications for planners and geotechs

    August 28, 2026|

    Reviewed by Tom Sullivan

    Develop’s Woodlawn drilling: 15-year mine life implications for planners and geotechs

    First reported on Australian Mining

    30 Second Briefing

    Develop Global’s latest underground drilling at the Woodlawn copper–zinc mine in New South Wales has returned intercepts grading up to 15.7 per cent copper equivalent (CuEq), supporting its Project DM15 plan to extend mine life from 10 to 15 years. The high-grade results, from step-out holes targeting depth extensions of existing lenses, suggest additional sulphide resources beyond the current reserve envelope. For mine planners and geotechs, this points to a longer stoping schedule, potential redesign of sequencing and backfill, and extended use of existing underground infrastructure.

    Technical Brief

    • Intercepts are reported in copper equivalent (CuEq), indicating polymetallic sulphide mineralisation with payable by-products.
    • Additional sulphide tonnage at depth would favour continued longhole open stoping over a shift to remnant mining.
    • Extended life at Woodlawn implies longer utilisation of current paste/backfill systems and underground services.
    • Geotechnical models for the lenses will need updating to incorporate deeper stress regimes and potential rock mass variability.
    • Similar life-extension drilling campaigns at mature VMS-style deposits have often converted exploration success into reserve growth.

    Our Take

    Develop Global is simultaneously advancing the Woodlawn copper‑zinc mine in New South Wales and the Yitirrti (Sulphur Springs) copper‑zinc‑silver project in Western Australia, signalling a deliberate build‑out of a multi‑asset base metals portfolio across two states.

    The very high copper‑equivalent grades reported at Woodlawn, combined with the 1.5 Mt/y processing plant now under EPC contract at Yitirrti, suggest Develop is positioning its copper and zinc assets towards the lower half of the cost curve, which could be important if prices soften.

    In our database of 1318 Mining stories, Woodlawn stands out as one of relatively few New South Wales copper‑zinc assets getting sustained project‑development coverage, whereas most other Develop Global items are tied to Western Australian projects such as Yitirrti and Pioneer Dome.

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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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