Friction Bolt-47-1800mm

  • -Friction Bolt-47-1800mm(Split sets) 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.
  • -Friction Bolt-47-1800mm reference to the AS/NZS1594 / ASTM A1011 standard.
  • -Hot rolled steel reference to the GBT3524-2015 standard.
  • -Usually combined with domed plates, provides anchoring force for rock strata.
  • -The Friction Bolt-47-1800mm have passed tests in many mines and have been supplied steadily for several years
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Product Details

Friction Bolt-47-1800mm Functions

Friction Bolt-47-1800mm Friction bolt is a frictional ground support system. When friction bolt is inserted into drilling hole with smaller diameter, the slot partially closes and bolt diameter is compressed, which creates radial forces  on rock roof surface along the whole length and firmly holds the rock.


Friction Bolt-47-1800mm Features&Advantages

Made from high strength steel band  

Immediate frictional Support in axial and radial

Independent supporting without plate

Easy for installation

Simple design, cost-saving

Available in black, cold galvanizing or hot dip galvanized


Friction Bolt-47-1800mm Mechanical Properties


Technical DataTRFB33TRFB39TRFB42TRFB47
Drill hole diameter (mm)30-3235-3838-4043-45.5
Min.Yield strength (kN)8090100120135
Min.Tensile strength (kN)100
120132165180
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-47-1800mm Accessories

      Bearing plate,Driver,Pull collar.


Friction Bolt-47-1800mm Length & Package

Length:450-3000mm as specified

Package:100pcs — 300pcs each bundle as specified 

Friction Bolt-47-1800mm  Friction Bolt-47-1800mm


Friction Bolt-47-1800mm Applications

Mines

Tunnels

Slopes

Places that need ground support


How to work

        Evaluate the ground's characteristics thoroughly before starting.

        

        Select the appropriate drill bit and create a hole based on the friction bolt's diameter, length, and the specified drilling procedure. 

        Ensure the hole extends at least 150mm beyond the friction bolt's length.

        

        Attach a plate to the friction bolt, ensuring the dome faces the ring and the tapered end leads.

        

        Install the friction bolts so they are perpendicular to the rock face for maximum stability.

        

        Insert a driver dolly into the bolt and drive the friction bolt into the hole until the plate is snug against the rock.

        

        Refrain from hammering the friction bolt once the plate is securely in place on the rock to prevent damaging the end of the bolt.

        

        After installation, conduct pull tests to assess the initial anchorage effectiveness of the friction bolts.

Friction Bolt-47-1800mm  Friction Bolt-47-1800mm


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