EXPANDABLE BOLTS
Expandable Bolts for Underground Mining and Tunnelling
Expandable Bolts are mechanical rock reinforcement systems designed to provide reliable ground support in underground mining, tunnelling and underground infrastructure projects.
SUCFOR Expandable Bolts are designed for applications where effective rock reinforcement, controlled load transfer and efficient installation are essential. Their mechanical expansion creates contact with the surrounding rock along the anchorage zone, providing a practical solution for reinforcing underground excavations.
How Expandable Bolts Work
Expandable Bolts are installed inside a drilled borehole and mechanically expanded against the surrounding rock. The expansion creates friction and contact between the bolt and the borehole wall, allowing loads to be transferred between the rock mass and the reinforcement.
This principle makes expandable rock bolts suitable for a variety of underground conditions, including fractured and variable rock masses where efficient mechanical anchorage is required.
Applications
Expandable Bolts can be used for:
- Underground mining
- Mining drifts and development headings
- Tunnelling
- Highway and railway tunnels
- Underground infrastructure
- Galleries and hydraulic infrastructure
- Rock reinforcement
- Ground stabilization
- Temporary and permanent ground support systems
Advantages
- Mechanical anchorage
- Efficient installation
- Suitable for fractured rock
- Immediate mechanical interaction with the surrounding rock
- Suitable for systematic rock reinforcement
- Compatible with rock support plates and other ground support components
- Suitable for demanding underground environments
Expandable Bolts can form part of a complete ground support system together with plates, mesh, shotcrete and other reinforcement technologies.
The appropriate bolt type, length, installation pattern and support configuration should always be determined according to the geological conditions, excavation geometry and geotechnical design.
SUCFOR supplies technical ground support solutions for mining, tunnelling and underground construction projects.