Production Reconciliation

Reconciliation compares predicted versus actual performance. Data Sources Predicted - Block model grades - Stope design tonnes - Development face grades Actual - Mill head grades - Surveyed volumes - Truck factors Reconciliation Metrics Tonnes Tonne factor = Actual tonnes / Predicted tonnes Grade Grade factor = Actual grade / Predicted grade Metal Metal factor = Actual metal / Predicted metal Analysis - Identify systematic biases - Track dilution sources - Improve estimation methods - Update models accordingly

All lessons in Underground Geology — Return to the complete Underground Geology course outline.
Previous lesson: Ventilation and Environment — Underground environments present unique challenges for geological work. Ventilation Primary - Main fan systems - Return airways - Minimum velocity…
Next lesson: Ore Control Systems — Effective ore control systems ensure efficient material flow. Material Designation - Ore to mill - Development waste - Fill material - Low-grade…

Verification resources

Cross-check terminology, classification, methods, and safety with these authoritative external resources.

Underground hard-rock mining — Canadian Centre for Occupational Health and Safety. Canadian occupational-health guidance about underground mining hazards and controls.
Mineral Exploration Best Practice Guidelines — Canadian Institute of Mining, Metallurgy and Petroleum. Professional guidance for geological records, sampling, interpretation, security, and QA/QC.
Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines — CIM Mineral Resources & Mineral Reserves Committee. Professional Canadian guidance for model validation and reconciliation that accounts for compatible supports, time periods, assumptions, uncertainty, and production evidence.

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Production Reconciliation

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Verification resources