Friction Bolt Ground Support

  • -Friction Bolt Ground Support, made from a strip of high-tensile steel, is roll-formed into a C-shape featuring a longitudinal slot for engagement. Designed with one end tapered to simplify insertion into a drill hole, the opposite end is securely welded to a ring that anchors the bearing plate.
  • -Thermal diffusion galvanizing is available for the friction Bolt ground support.
  • -Usually combined with domed plates, provides anchoring force for rock strata.
  • -Friction Bolt Ground Support undergoes very stringent tensile testing to ensure product quality.
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Product Details

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.

 

Friction Bolt Ground Support Features&Advantages

Made from high-strength steel band  

Immediate frictional Support in axial and radial

Independent support without a plate

Easy for installation

Simple design, cost-saving

Available in black, cold galvanizing, or hot dip galvanized


Friction Bolt Ground Support Mechanical Properties


Technical DataTRFB33TRFB39TRFB42TRFB47
Drill hole diameter (mm)32-3535-3838-4043-45.5
Min.Yield strength (kN)8090100120
135
Min.Tensile strength (kN)100120132165180
Typ.Tensile strength (kN)120130150180200
Elongation (A%)≥20≥20≥20≥20
Typ.Anchorage (ton/m)4-64-75-86-10
Bearing plate (mm)150x150x4150x150x4150x150x4.5150x150x5

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-47-3000mm  Friction Bolt-47-3000mm


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.

Friction Bolt-47-3000mm  Friction Bolt-47-3000mm        




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