PERUMIN 33: The Best Decision - RAMP Versus Vertical

Introduction

At the PERUMIN 33 Mining Convention in Arequipa, Peru, we presented a comprehensive analysis of mining access methods, specifically comparing ramp systems versus vertical shafts. The presentation focused on helping mining operations make informed decisions based on their specific circumstances and requirements.

Key Decision Factors

Several critical factors influence the choice between ramp and vertical access:

Deposit depth and geometry
Production rate requirements
Initial capital investment
Operating costs
Project timeline
Geotechnical conditions
Ventilation requirements
Future expansion possibilities

Comparative Analysis

Ramp Systems

Advantages:

Lower initial capital investment
Flexible access to multiple levels
Simpler construction process
Easier maintenance access
Progressive development possible

Challenges:

Higher operating costs over time
Limited by practical depth constraints
Increased ventilation requirements
Higher energy consumption
Longer haulage times at depth

Vertical Shafts

Advantages:

Lower long-term operating costs
Efficient deep access
Better ventilation efficiency
Faster material movement
Lower energy consumption per ton

Challenges:

Higher initial capital investment
Longer construction time
Less flexibility for changes
More complex maintenance
Specialized equipment required

Decision Framework

The presentation introduced a structured decision-making framework considering:

Technical feasibility
Economic analysis
Risk assessment
Operational flexibility
Long-term sustainability
Safety considerations

Conclusion

The optimal choice between ramp and vertical shaft access depends heavily on site-specific factors. While ramps often provide advantages for shallower operations and staged development, vertical shafts typically become more economical as depth and production rates increase. A thorough analysis of all factors is essential for making the best decision for each unique mining operation.