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    Thiess–AECI explosives JV extension: planning and blast design notes for engineers

    June 10, 2026|

    Reviewed by Joe Ashwell

    First reported on International Mining – News

    30 Second Briefing

    Thiess has extended its joint operating agreement with explosives supplier AECI to December 2030, covering blasting services and product supply at the Lake Vermont, Olive Downs Complex and Mount Pleasant coal operations in Australia. The deal secures continuity of bulk explosives, initiation systems and on-bench blasting support across multiple large-scale open-cut pits in Queensland and New South Wales. For mine planners and drill-and-blast engineers, the extension reduces supply risk for explosives and maintains consistent blast performance parameters over the medium term.

    Technical Brief

    • Continuity of a single explosives partner simplifies blast design templates and fragmentation performance benchmarking.
    • Long-term contract structure reduces tendering frequency and associated drill‑and‑blast transition risk.
    • Stable blast inputs assist mine scheduling, cast‑blast optimisation and overburden movement cost control.
    • Similar multi‑site explosives frameworks are increasingly used on large mining portfolios to de‑risk supply chains.

    Our Take

    Thiess has featured repeatedly in recent Australian Mining and International Mining coverage, from restarting iron ore at Koolyanobbing to underground work at Sunday Creek, so locking in an explosives JV with AECI to 2030 signals a push to standardise blasting supply and practices across a growing east–west project footprint.

    The inclusion of Queensland coal assets such as Lake Vermont and Olive Downs Complex alongside New South Wales’ Mount Pleasant suggests the Thiess–AECI arrangement is structured to support high-volume coal overburden and coal production, where consistent explosives performance is critical to both cost control and vibration/dust compliance near communities.

    Rae O’Brien’s recent recognition in Queensland resources leadership coverage, combined with this long-dated JV in Australia, indicates Thiess is pairing visible ESG and diversity leadership with hard-operational levers like explosives technology and supply security to defend margins in competitive contract tenders out to 2030.

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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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