Friction Bolt Ground Support
- -Made of high strength material
- -Easy and quick installation using standard drilling equipment
- -No anchoring agent or group required
- -High shear and tensile strength
- -Combined with domed plates, provides anchorage force for rock strata
Friction Bolt Ground Support Functions
Friction Bolt Ground Support is a frictional ground support system. When a friction bolt is inserted into a drilling hole with a smaller diameter, the slot partially closes and the bolt diameter is compressed, which creates radical forces on the rock roof surface along the whole length and firmly holds the rock.
Usually combined with domed plates, provides anchoring force for rock strata.
Friction Bolt Ground Support Mechanical Properties
| Technical Data | TRFB33 | TRFB39 | TRFB42 | TRFB47 | |
| Drill hole diameter (mm) | 32-35 | 35-38 | 38-40 | 43-45.5 | |
| Min.Yield strength (kN) | 80 | 90 | 100 | 120 | 135 |
| Min.Tensile strength (kN) | 100 | 120 | 132 | 165 | 180 |
| Typ.Tensile strength (kN) | 120 | 130 | 150 | 180 | 200 |
| Elongation (A%) | ≥20 | ≥20 | ≥20 | ≥20 | |
| Typ.Anchorage (ton/m) | 4-6 | 4-7 | 5-8 | 6-10 | |
| Bearing plate (mm) | 150x150x4 | 150x150x4 | 150x150x4.5 | 150x150x5 200x200x5 | |
Friction Bolt Ground Support Accessories
Driver, Pull collar,Bearing plate.
Friction Bolt Ground Support Length & Package
Length:450-3000mm as specified
Package:100pcs — 300pcs each bundle as specified
Friction Bolt Ground Support Applications
Mines
Tunnels
Slopes
Places that need ground support
How to work
Firstly, conduct an assessment of the ground conditions.
Select the appropriate bit and bore a hole by the diameter and length of the friction bolt ground support, as well as the specified drilling method.
Ensure the hole's length exceeds the friction bolt's length by at least 150mm.
Affix a plate onto the friction bolt ground support, positioning the dome against the ring and the tapered end towards the front.
Install the friction bolt ground support so they are perpendicular to the rock's surface.
Insert the driver dolly into the bolt and drive the friction bolt ground support into the hole until the plate is securely against the rock surface.
Avoid striking the friction bolt once the plate is snugly attached to the rock surface to prevent damage to the end of the friction bolt ground support.
After installation, conduct pull tests to verify the initial anchorage effectiveness of the friction bolts.
