Friction Bolt/Split Set bolts

Friction bolt(Split sets)

Friction bolt (Split sets)is rollformed into a C shape bolt with slot by high tensile steel band,which one end is tapered

for easily insertingbolt into drillinghole.The other end is welded a ring to hold the bearing plate.

Functions

Friction bolt (Split sets) 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 radical forces  on rock roof surface along the whole length and firmly holds the rock.

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

Mechanical Properties

Accessories

Bearing plate,Driver,Pull collar.

Length & Package

• Length:450-3000mm as specified

• Package:100pcs — 300pcs each bundle as specified

Applications

• Mines

• Tunnels

• Slopes

• Places where need ground support

How to work

• The nature of ground must be evaluated.

• Choose the proper bit and drill a hole according to bolt diameter,bolt length,and drilling procedure,and length is at least 150mm longer than length of friction bolt.

• Place a plate onto friction bolt (dome against the ring,tapered end at front).

• Friction bolts must be installed as perpendicular to the rock surface.

• Put driver dolly into bolt and drive friction bolt into the hole until the plate is firmly against the rock surface.

• Do not pound on the friction bolt when plate tightly fixes on the rock surface,in order to avoid damage of  

  friction bolt end.

• Pull tests shall be performed to determine initial anchorage of the friction bolts after installation.