Geomechanics.io

  • Free Tools
Sign UpLog In

Geomechanics.io

Geomechanics, Streamlined.

© 2026 Geomechanics.io. All rights reserved.

Geomechanics.io

CMRR-ioGEODB-ioHYDROGEO-ioQCDB-ioFree Tools & CalculatorsBlogLatest Industry News

Industries

MiningConstructionTunnelling

Company

Terms of UsePrivacy PolicyLinkedIn
    Projects

    Lunnon Metals’ Lady Herial gold pit: production outcomes and design cues for engineers

    September 8, 2026|

    Reviewed by Tom Sullivan

    Lunnon Metals’ Lady Herial gold pit: production outcomes and design cues for engineers

    First reported on Australian Mining

    30 Second Briefing

    Lunnon Metals’ completed Lady Herial open pit in Western Australia is expected to deliver about $39 million in pre-tax free cash flow after producing slightly more gold than forecast in the January 2026 feasibility study. Mining finished in early August, ahead of schedule, with final ore processing and reconciliation now under way to refine grade, recovery and cost assumptions. The outcome provides fresh performance data for Lunnon’s future open-pit designs and cut-off strategies in the Kambalda district.

    Technical Brief

    • Lady Herial is a shallow open pit gold operation in Western Australia.
    • Ore was trucked to a third-party processing plant under toll treatment arrangements rather than on-site processing.
    • Lunnon Metals used the pit as an initial cash-generating asset while advancing its nickel portfolio.
    • Mining data from Lady Herial will be used to refine geotechnical and dilution assumptions for future pits.
    • Reconciliation outcomes are expected to inform updated pit shell optimisations and economic cut-off grades across nearby prospects.
    • Operational performance at Lady Herial provides a benchmark for contractor productivity and unit mining costs in local conditions.
    • The project offers a short-cycle case study in sequencing small open pits within a predominantly underground-focused mining district.

    Our Take

    An expected A$39 million pre-tax free cash flow from Lady Herial puts Lunnon Metals’ gold exposure into the mid-tier of Western Australian project cash generators in our database, giving it optionality to self-fund parts of its 2026 feasibility work rather than relying solely on equity raisings.

    With feasibility work flagged for January 2026, Lunnon Metals is timing its study pipeline to coincide with heightened industry attention on digital and automation integration in Australian mines, as highlighted in the August 27, 2026 piece on AI and connected data, which could influence how it scopes future project designs.

    Geotechnical Software for Modern Teams

    Centralise site data, logs, and lab results with GEODB-io, CMRR-io, and HYDROGEO-io.

    No credit card required.

    • Save and export unlimited calculations
    • Advanced data visualisation
    • Generate professional PDF reports
    • Cloud storage for all your projects

    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.

    Related Articles

    Mining
    about 1 hour ago

    PROK Johannesburg idler plant: supply-chain and design notes for mine engineers

    PROK has opened a new idler manufacturing facility in Johannesburg to supply conveyor components for African mining and bulk materials handling operations. The plant will produce PROK’s conveyor idlers and rollers locally, reducing lead times compared with imports and supporting large overland and in-plant conveyor installations. The investment signals a push for regionalised supply of wear-critical components, which could improve availability and lifecycle support for high-capacity conveyor systems in South African and neighbouring mines.

    Mining
    about 1 hour ago

    KGHM–BHP copper MoU: exploration JV implications for project engineers

    KGHM Polska Miedź SA and BHP, via BHP World Exploration Inc, have signed a Memorandum of Understanding to create a formal framework for cooperation on copper-focused exploration and development projects. The MoU initiates structured technical dialogue between the two majors on potential joint work, likely covering greenfield targeting, resource definition drilling and project evaluation. For engineers, the move signals possible future collaboration on large-scale porphyry copper systems, shared geoscience datasets and standardised approaches to resource modelling and project development.

    Mining
    about 1 hour ago

    Viridis Colossus rare earths filter order: tailings design notes for engineers

    Viridis Mining and Minerals has placed its first major equipment order for the Colossus Rare Earth Project in Brazil, selecting a residue pressure filtration package from specialist clay filter press manufacturer Dewater Filter Press Srl of Cagli, Italy. The large pressure filter will handle clay-rich rare earth residues, a critical step for achieving low-moisture filter cakes suitable for dry stacking or controlled storage. The order signals Viridis’ move from project development towards an engineered flowsheet and defined tailings and residue management strategy.

    Related Industries & Products

    Mining

    Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.

    Tunnelling

    Specialised solutions for tunnelling projects including grout mix design, hydrogeological analysis, and quality control.

    CMRR-io

    Streamline coal mine roof stability assessments with our cloud-based CMRR software featuring automated calculations, multi-scenario analysis, and collaborative workflows.

    HYDROGEO-io

    Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.

    GEODB-io

    Centralised geotechnical data management solution for storing, accessing, and analysing all your site investigation and material testing data.

    AllGeotechnicalInfrastructureHazardsEnvironmental