Brightstar’s 225.7m at Two Mile Hill: bulk underground design notes for engineers
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Brightstar Resources has reported a 225.7m intercept grading 3.11g/t gold from 284m depth in hole TMHRCD26006A at the Two Mile Hill–Shillington deposit, including a high-grade core of 19m at 24.3g/t, at its Sandstone project in Western Australia. The broad, unconstrained mineralisation from infill drilling materially strengthens the potential for a bulk underground mining scenario rather than a narrow-vein approach. Geotechnical and mine design teams will now be able to model a large, continuous orebody at depths beyond 280m, with implications for stope geometry, ground support and ventilation planning.
Technical Brief
- Broad, unconstrained mineralisation suggests reduced need for tightly targeted narrow-vein drilling patterns.
- Continuous ore zone at this depth supports consideration of large stopes over selective, narrow stoping.
- Deeper underground scenario will drive requirements for longer ventilation raises and extended escapeways.
- Ground support design will likely shift towards systematic cable bolting and mesh in large-span stopes.
- Mine scheduling can now contemplate bulk tonnage extraction sequences rather than vein-by-vein sequencing.
Our Take
The 225.7m at 3.11g/t intercept at the Two Mile Hill–Shillington deposit follows the earlier 305.4m at 1.82g/t (3 August 2026 item), suggesting Brightstar Resources is consistently defining thick, moderate-to-high grade mineralisation at depth rather than isolated high-grade shoots.
Combined with the first >1000m diamond hole intersecting over 500m of mineralised tonalite at Two Mile Hill (24 August 2026 article), this latest result strengthens the case for a bulk underground or large-tonnage scenario at the Sandstone gold project rather than a narrow-vein development.
Across our Mining–Projects coverage, Western Australian gold stories are common, but Brightstar Resources stands out in the database for pairing long, continuous intercepts at Sandstone with parallel investment in processing capacity at the Laverton plant, indicating a coordinated resource-to-plant development strategy.
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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