Expandable Rock Bolts
Overview
Normet Expandable Rockbolts (ERBs) are hydraulically installed rock reinforcement solutions that use omega-profile steel tubes to expand within the support hole, providing immediate full-length frictional anchorage. This rapid and efficient system ensures reliable reinforcement, making ERBs ideal for temporary roof and rib support in tunneling and mining, and also in civil engineering applications.
Normet ERBs are a versatile solution for projects requiring fast and effective temporary reinforcement.
Rapid Installation, Immediate Safety
ERB bolts are typically installed in tunnelling, mining, and civil engineering applications where temporary and immediate rock reinforcement is needed.
Key specification
- Versatile solution for project requiring fast and effective temporary reinforcement
Key benefits
Expandable Rock Bolts
- Easiness of installation
- High Productivity: 50% faster than typical rock bolts
- Instant anchorage after expansion, no grouts or resin needed.
- They are suitable for varied ground conditions
- Full-length anchorage and load distribution
- Can accommodate large rock displacements while maintaining load-bearing capacity.
- The radial pressure exerted by the expanded bolt compresses the surrounding rock, radially pre-stressing the rock mass and enhancing the stability and integrity of the opening.
Typical applications
- Rib and roof support
- Face stabilization
- Slope stabilization
- Retaining wall support
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