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    Sandfire MATSA Sotiel mine blast: remote initiation lessons for mine engineers

    July 10, 2026|

    Reviewed by Tom Sullivan

    First reported on International Mining – News

    30 Second Briefing

    Sandfire MATSA has completed the first 100% surface-initiated underground blast at the Sotiel polymetallic mine in Calañas, Huelva, working with contractor Insersa and explosives specialist MAXAM. The blast was fully controlled from surface, removing personnel from the immediate firing area and validating remote initiation across the mine’s existing underground communications and blasting infrastructure. The move signals wider deployment potential for digitally controlled blasting sequences in complex Iberian Pyrite Belt orebodies where multiple headings and constrained access raise exposure risks.

    Technical Brief

    • Similar Iberian Pyrite Belt mines with complex multi-access layouts could adapt comparable remote-firing workflows to cut personnel-at-face time.

    Our Take

    The related December 2025 piece on Sandfire’s MATSA complex highlights Sotiel as one of three underground feed sources to a 4.7 Mt/y plant, so moving to 100% surface‑initiated blasting there is likely a test bed for practices that could later be standardised across Aguas Teñidas and Magdalena.

    Among recent safety‑tagged mining items in our database, full remote control of blasting is still relatively rare in European underground operations, suggesting Sandfire MATSA is positioning Sotiel as a reference site for high‑automation drill‑and‑blast in Spain’s Huelva belt.

    For contractors like Insersa and product suppliers such as MAXAM, demonstrating 100% remote blasting at Sotiel in Calañas gives them a strong case study for other polymetallic underground mines in Spain that are under pressure to reduce personnel exposure at the face while maintaining high production rates.

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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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