AIC Mines’ Eloise and Jericho copper reserves: mine design and scheduling notes
Reviewed by Joe Ashwell

First reported on Australian Mining
30 Second Briefing
AIC Mines has reported record copper ore reserves at its Eloise and Jericho projects in Queensland, following an updated mineral resource and reserve estimate that extends mine life and supports higher long-term throughput at the Eloise processing plant. The combined underground operations, which target structurally controlled, high-grade sulphide lodes, are being optimised around existing decline access and ventilation infrastructure to reduce unit costs and improve stope sequencing. Geotechnical and mine planning teams will need to reassess ground support, paste fill requirements and scheduling to align with the larger reserve base and extended production horizon.
Technical Brief
- Mineralisation remains dominated by high-grade sulphide lodes associated with shear zones and structural complexity.
- Eloise’s existing processing plant configuration is retained, avoiding major new surface plant capital.
- Decline access and established ventilation circuits at both mines constrain stope layout and expansion directions.
- Integration of Jericho ore into Eloise’s plant feed requires careful blending to manage variable sulphide textures.
- Paste fill demand will increase in secondary stopes as extraction fronts extend along strike and at depth.
- Longer mine life will necessitate staged refurbishment of underground services: power reticulation, pumping and ventilation.
- Similar brownfield copper operations with multiple lodes can apply comparable optimisation around existing declines and fans.
Our Take
The all-time-high copper reserves at Eloise and Jericho are consistent with AIC Mines’ recent report of materially expanded high-grade mineralisation at depth at Jericho (Dec 2025), suggesting the resource base is still in a growth phase rather than approaching maturity.
Underground connectivity between Eloise and Jericho, confirmed in the February 2026 item, means higher reserves can likely be scheduled through a shared infrastructure corridor, which typically lowers unit costs and de-risks development of the satellite orebody in north-west Queensland.
Within our Mining projects coverage, copper items linked to Australian underground operations like Eloise–Jericho are relatively prominent among the 1815 copper keyword-matched pieces, signalling that brownfield reserve growth in established camps is a key theme for Australian copper supply rather than greenfield builds.
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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