🔧 Key Features
Compact size → Ideal for small cross-section tunnels and mine drifts
Single boom or mini double boom → Flexible drilling angles
Hydraulic drilling system → Stable and efficient rock penetration
Crawler or wheeled chassis → Easy movement in confined underground spaces
Low height design → Suitable for low-clearance environments
🏗️ Typical Applications
Underground metal and coal mines
Narrow tunnel excavation
Drift and crosscut development
Anchor bolt installation
Small-section hydropower or utility tunnels
⚙️ Advantages
High maneuverability in tight spaces
Lower operating cost compared to large jumbos
Improved safety vs. manual drilling
Accurate drilling positioning for blasting or bolting
📏 Typical Technical Parameters
(Varies by manufacturer, but generally:)
Drilling coverage: 10–40 m²
Hole diameter: 32–76 mm
Hole depth: 2.0–4.5 m
Boom reach: 4–7 m
Power: electric or diesel-electric hybrid
⚠️ Selection Considerations
When choosing a mini jumbo, focus on:
Tunnel cross-section size
Rock hardness and geology
Required drilling speed and accuracy
Need for bolting vs. only drilling
Ventilation conditions (diesel vs. electric)
💡 Practical Tip
For underground mines with very narrow drifts (under 3 m width), a single-boom mini jumbo is usually the best choice. For slightly larger headings, a compact double-boom jumbo can significantly improve efficiency.
If you want, we can recommend specific models or configurations based on your tunnel size and rock conditions.
