Built by a geologist
Open Pit Geology
Grade control, bench mapping, and ore body delineation for surface mining operations. This free track includes 10 structured lessons with practical field context and review questions.
Lessons in Open Pit Geology
- Introduction to Open Pit Mining — Open pit mining is a surface mining technique used when ore bodies are near surface and cover large areas.
- Grade Control Fundamentals — Grade control is the process of delineating ore from waste at the mining face. Objectives - Maximize ore recovery - Minimize dilution waste in ore …
- Blast Hole Sampling — Blast hole sampling provides the primary data for grade control decisions. Sample Collection Cone Sampling Collect representative sample from drill…
- Bench Mapping — Bench mapping documents the geology exposed on mining faces. Purpose - Validate geological model - Identify structural controls - Guide grade control …
- Ore/Waste Delineation — Delineating ore from waste is the core function of grade control. Polygon Generation Inverse Distance Weight nearby samples by inverse of distance.
- Production Sampling — Ongoing sampling during production monitors mill feed grade. Sample Points - Truck sampling random selection - Stockpile sampling - Conveyor belt…
- Geological Model Updates — The geological model must be regularly updated with new information. Data Sources - Blast hole assays - Face mapping - Production sampling - New drilling…
- Pit Wall Geotechnics — Understanding pit wall stability is critical for safe and efficient mining. Failure Modes Planar Sliding along a single plane bedding, fault .
- Pit Optimization — Pit optimization determines the ultimate pit limits. Lerchs-Grossmann Algorithm - Industry-standard method - Maximizes NPV Net Present Value - Creates…
- Mine Planning Integration — Geologists must integrate with mine planning for effective operations. Short-Term Planning - Weekly mining schedules - Grade control input - Equipment…
Verification resources
Cross-check terminology, classification, methods, and safety with these authoritative external resources.
- Mineral Exploration Best Practice Guidelines — Canadian Institute of Mining, Metallurgy and Petroleum. Professional guidance for geological data, sampling, interpretation, security, and QA/QC.
- The life cycle of a mineral deposit — U.S. Geological Survey. Scientific context for mineral deposits, extraction, processing, and reclamation.
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