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Friction Bolts
Specifications
Friction Bolt (commonly known as Split Sets)
Friction Bolts (Split Sets) are roll-formed into a "C" shape bolt with slot down one side. They are manufactured using High Tensile Steel band and one end of the bolt is tapered for easily inserting the bolt into the drilled borehole.
The other end of the bolt has a welded ring to hold the bearing plate.
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Functions
The Friction Bolt is a frictional ground support system. When the friction bolt is inserted into the pre-drilled hole which is of a slightly smaller diameter, the slot on the Friction Bolt partially closes and the bolt diameter is compressed/reduced, which creates radical forces on the rock surface along the entire length of the Friction Bolt and firmly holds the in-situ rock mass in place.
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Features & Advantages
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Made from high strength steel band
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Immediate frictional Support in axial and radial
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Independent supporting without plate
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Easy for installation
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Simple design,cost saving
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Available in black,cold galvanizing or hot dip galvanized
Accessories
Bearing Plate, Driver, Pull collar.
Length & Package
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Length:450 - 3000mm as specified
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Package:100pcs — 300pcs each bundle as specified
Applications
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Mines
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Tunnels
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Slopes
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Construction
Friction Bolt Use
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The nature and competency of ground must be assessed.
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Choose the proper diameter drill bit and drill a hole according to the bolt diameter, bolt length, and drill plan.
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Drill the borehole at least 150mm longer than length of the friction bolt.
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Place a plate onto the friction bolt (dome against the ring, tapered end at front).
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Friction Bolts must be installed as perpendicular to the rock surface as possible.
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Place the driver dolly into the Friction Bolt and drive the Friction Bolt into the borehole until the plate is firmly located against the rock surface.
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Do not place impact on the Friction Bolt when plate has located against the rock surface in order to avoid damage of the Friction Bolt end.
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Once installed "Pull Tests" shall be performed to determine the initial anchorage capability of the Friction Bolt.
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Rock Bolts
Specifications
The full threadbar bolt is made of hot rolled rib bar. which has great anchoring effect and can be cut according to demands.
Functions:
Being used with face plate, domed ball,anti-friction washer and nut.
Full treadbar bolt can be an effective rock reinforcement system for ground support.
Features & Advantages:
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Available in left hand or right hand tread.
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Higher thread ribs mix resin better and improve anchorage.
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Suitable for using with either resin cartridges or cement grout.
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It has equal strength on the entire length.
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Due to continuous thread on entire length. the nut can be fastened upward at any place. This will increase the material utilization ratio and save cost.
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Available in black or hot dip galvanized.
Bearing plate:
Round plate, domed plate
Accessories:
Domed nut, hex nut, anti-friction washer, domed ball
Length & Package
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Bolts are packaged in bundles.
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Bolt fittings, such as nuts, anti-friction washers and domed balls, are supplied fitted to the rock bolts in the configuration requested.
Applications:
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Mines
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Tunnels
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Slopes
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Sites where ground support is required
Specifications
Sharp end Threadbar Bolt
The Sharp end bolt is manufactured from full threadbar, TR Bar or Rebar.
One end is cut into a sharp end and the other end is a rolled thread.
Functions:
Used with plate, domed ball, anti-friction washer and nut,
The Sharp End Threadbar Bolt can be an effective Rock Reinforcement System for Underground Rock Support.
Features & Advantages:
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The sharp end of the bolt can break the resin cartridge/s easily to improve installation efficiency.
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With a pin nut device, the nut could help drive the bolt to mix the resin.
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Used for permanent ground support.
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Fast and easy installation by mechanised tools.
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Available in black or hot dip galvanized (HDP).
Bearing plate:
Round plate, domed plate
Accessories:
Domed nut, Hex nut, Anti-friction Washer, Domed ball
Length & Package:
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Bolts are packaged in bundles.
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Bolt fittings, such as nuts, anti-friction washers and domed balls, are supplied fitted to the rock bolts in the configuration requested.
Applications:
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Mines
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Tunnels
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Slopes
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Sites where ground support is required
High Strength 840 Grade Bar
Key Features
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Extra High Strength
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Resin Anchored Bolt
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Product has been tested by SGS at the Woolongong University, Australia
Accessories:
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Bearing plate, Nut, Domed Ball, Anti-friction Washer
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Length & Package:
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Length: 450mm - 3,000mm as specified
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Package: 100pcs — 300pcs per bundle as specified
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Other: Optional dimensions and designs can be customised to suit particular customer applications and requests.
Key Features:
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Manufactured from high strength full threadbar with a hot forged integral head on one end and the other end has
the expansion shell.
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Available in left-hand or right-hand thread.
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The same tensile strength for the entire length of the bolt.
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Suitable for use in areas where the roof height is low or when long bolt tails are undesirable.
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Nominal diameter, 16mm / 18mm / 20mm can be supplied.
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Corrosion protection may be provided by Hot Dip Galvanizing (HDG) or Thermal Diffusion.
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Technical conditions of the Expansion Shell Bolt 16mm
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Nominal diameter 16mm
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Tensile strength minimum 100kN
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Square forged head
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Forged head must be reused with 340Nm bolting
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Expansion Shell Design
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Length: 100mm - 130mm
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Length of the ribbed leaf: 75mm MIN
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Expansion shell diameter 38mm to suit a borehole with 40mm - 44mm diameter
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Mechanical strength of the expansion shell: 90kN MIN
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Torque of roof support tightening: 250 - 350Nm
Accessories
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Bearing Plate, Expansion Shell
Length & Package
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Length: 450mm - 3000mm as specified
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Package: 100 units - 300 units per bundle as specified
Other: Other dimensions and designs can be customised to suit specific applications.
The paddle bolt, which is also named the "grooved bolt" is manufactured from full threadbar, TR-Bar or Rebar. One end is stamped into a 3½ paddle configuration and the other end is rolled thread.
Functions:
Being used with plate, domed ball, anti-friction washer and a nut, Paddle bolts can be an effective rock reinforcement system for underground rock support.
Features & Advantages:
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Available in various of bar configurations.
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The paddle configuration in the end of the bolt ensures the bolt is centrally located inside the borehole.
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The paddle configuration will improve resin mixing and consequently provide a high bond strength.
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With the pin nut device, the nut could help drive the bolt to mix the in-situ resin.
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Used for permanent ground support.
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Fast and easy installation by mechanised tools.
-
Available in black or hot dip galvanized (HDG).
Bearing plate:
Round plate, domed plate
Accessories:
Domed Nut, Hex Nut, Anti-friction Washer, Domed ball
Length & Package:
-
Bolts are packaged in bundles.
-
Bolt fittings, such as nuts, anti-friction washers and domed balls, are supplied fitted to the rock bolts in the configuration requested.
Applications:
-
Mines
-
Tunnels
-
Slopes
-
Sites where ground support is required
Key Features
Made of hot rolled reinforcing bar which has rib deformation. The Solid Deformed Bar has a standard rolled thread at one end suitable for using with either a resin capsule or grout.
Diameter 16mm/18mm/20mm or 24mm can be supplied.
Available in black or hot dip galvanized (HDG).
Accessories
Bearing plate, Nut, Domed ball, Anti-friction washer
Length & Package
Length: 450-3,000mm as specified
Package: 100pcs — 300pcs per bundle as specified
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Others: Other dimensions and designs can be customised to suit your particular applications.
Slot & Wedge Bolt, which is also called a Kiruna Bolt can be manufactured from full threadbar, TR-Bar or Rebar.
One end is cut into a 100mm cross slot to insert the steel wedge and the other end is a rolled thread.
Functions:
Being used with a face plate, domed ball, anti-friction washer and nut,
The full threadbar bolt can be an effective rock reinforcement system for underground rock support.
Features & Advantages:
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A proven solution – used in LKAB’s Underground Mines in Sweden for over 40 years
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The wedge enables pre-tensioning before the concrete hardens.
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Immediate load-carrying capacity.
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Suitable for using with either resin cartridges or cement grout.
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Used for permanent ground support.
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Fast and easy installation by mechanised tools.
-
Available in black or hot dip galvanized (HDG).
Bearing plate:
Round plate, domed plate
Accessories:
Domed nut, Hex nut, Anti-friction washer, Domed ball
Length & Package:
-
Bolts are packaged in bundles.
-
Bolt fittings, such as nuts, anti-friction washers and domed balls, are supplied fitted to rock bolts in the configuration requested.
Applications:
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Mines
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Tunnels
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Slopes
-
Sites where ground support is required
The E-Bolt is made of smooth round bar with a paddle configuration.
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Functions:
It is an effective rock reinforcement system for underground roof support. If there is rock mass deformation, the paddle part will be worked as anchor points to bear the load and smooth section will absorb energy to prevent rock fall.
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Features & Advantages:
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After fully grouted in the bore hole, the paddle part of the bolt will work as anchor points. If there is rock mass deformation, the paddle section will bear the load, and the smooth section can move axially or radially without constraints and absorb energy to prevent rockfall.
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The Kiruna wedge can be used for immediate support function so that the wire mesh can be installed together with the bolt.
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This E-Bolt is particularly suitable for Mines with large deformations in the rock mass, e.g. Seismically
active Mines, Rock Burst or "Squeeze Rock areas.
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This product has been tested and approved by CANMET, CANADA
Mechanical properties:
Product name: 20mm E-Bolt
Smooth section diameter: 20mm
Yield strength: ＞500MPa/160kN
Tensile strength: ＞630MPa/200kN
Displacement capacity: (for 2.1m E-Bolt） >200mm
Energy absorbing: ＞40kJ
Elongation after fracture: >20%
Suggested bore hole diameter: 28-30mm
Bearing plate:
Round plate, Domed plate
Accessories:
Domed nut, Hex nut, Anti-friction washer, Domed ball
The Kiruna wedge can be used for immediate support.
Length & Package:
-
Bolts are packaged in bundles.
-
Bolt fittings, such as nuts, anti-friction washers and domed balls, are supplied fitted to rock bolts in the configuration requested.
Applications
-
Mines
-
Tunnels
-
Slopes
-
Sites where ground support is required
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