Contenidos de Curso

Introduction to Open Pit Mining Practices

• Case Studies
• Open pit Mining Terminology
• Pit Geometry and Stope angles – Slope Monitoring Systems
• Open Pit Mine Planning Fundamentals and Concepts – Circular Analysis
• Drill Hole Assays and composites Data, Geologic Cross Sections and Block Modeling
• Geologic Block Modeling Techniques – Geostatistical Resource estimation Methods
• Resource Model vs. Mined Production – Reconciliation Methods

Economic Definition of Ore

• Cutoff Grade Definition – breakeven Cutoff Grade for simple and multiples process operations
• Economic Block Model Generation form Resources Model
• Definition of Ore Reserves – Strip Ratio Analysis and Cone Mining Model
• Optimization of Pit Limits – Learchs and Grossman (LG) Algorithm
• Mining Sequence – Definition of Nested Pits, Pushbacks and Phases
• Breakeven Cutoff Grade Policy, Scheduling and Cash Flow Analysis

Optimizing Cutoff Grades by Lane’s Approach

• Relationship between Opportunity Cost and Declining Cutoff Grades
• Economic Cutoff Grades and Balancing Cutoff Grades
• Determination of Cutoff Grades when mill is the bottleneck
• Determination of Cutoff Grades when mine and mill capacities are limiting
• Determination of Optimum Cutoff Grades under Mine, Mill and Refinery/Market capacity Constraints
• Case Study 1 – Gold Mine Cutoff Grade Optimization
  Case Study 2 – Copper Mine Cutoff Grade Optimization

Assumptions and shortcomings of Lane´s Cutoff Grade Optimization Method

• Cutoff Grade Optimization for Multi Commodity Deposits; Cutoff Grade Optimization for multi-metallurgical process operations; cutoff grade optimization with blending constraints
• Optimization of cutoff grades for multi mine, multi commodity and multi process operations
• Optimization of mining and processing production capacities

Cutoff Grade Papers – By K. Lane and K. Dagdelen

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