Friction Bolt -42-1800mm
- Friction Bolt -42-1800mm is roll-formed into a C-shaped bolt with a slot by a high tensile steel band, which one end is tapered for easily inserting the bolt into drilling hole. The other end is welded a ring to hold the bearing plate.
- -Has high shear and tensile strength.
- -Usually combined with domed plates, provides anchoring force for rock strata.
- -Friction bolt reference to the AS/NZS1594 / ASTM A1011 standard.
Friction Bolt -42-1800mm Functions
Friction Bolt -42-1800mm is an efficient ground support slement commonly used in underground installations that work primarily through friction,providing immediate reinforcement.They consist of a longitudinally grooved steel tube,with one end tapered to facilitate easy insertion into a borehole.
Friction Bolt -42-1800mm Features&Advantages
Independent supporting without plate
Easy for installation
Simple design,cost saving
Available in black,cold galvanizing or hot dip galvanized
Made from high strength steel band
Immediate frictional Support in axial and radial
Friction Bolt -42-1800mm Mechanical Properties
| Technical Data | TRFB33 | TRFB39 | TRFB42 | TRFB47 | |
| Drill hole diameter (mm) | 30-32 | 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 -42-1800mm Accessories
Bearing plate,Driver,Pull collar.
Friction Bolt -42-1800mm Package
Package:100pcs — 300pcs each bundle as specified
Friction Bolt -42-1800mm Applications
Mines
Tunnels
Slopes
Places where need ground support
How to work
The nature of mine need to be evaluated.
Choose the applicable bit and drill a gap in accordance to bolt diameter,bolt length,and drilling procedure,and size is at least 150mm longer than size of friction bolt.
Place a plate onto friction bolt (dome in opposition to the ring,tapered end at front).
Friction bolts have to be mounted as perpendicular to the rock surface.
Put driver dolly into the bolt and power friction bolt into the gap till the plate is firmly in opposition to the rock surface.
Do not pound on the friction bolt when plate tightly fixes on the rock surface,in order to keep away from harm of friction bolt end.
Pull exams shall be carried out to decide the preliminary anchorage of the friction bolts after installation.
