Split set rock bolt

Split set rock bolt also called Split Set Stabilizer,Friction Bolts Split Sets, is an indispensable advanced material for underground mining support.

Split set rock bolt is a very specific support product, and it is an advanced material used for the support of the roof of the underground copper or gold mining and other projects.


Product Description

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Split Set rock bolt are rock bolts with only 2 parts, a tube and matching domed bearing plate. The high strength steel tube is slotted along its length. One end is tapered for easy insertion into a drill hole and the other has a welded ring flange to hold the bearing plate.

With the bearing plate in place, the tube is driven into a slightly smaller hole, using the same standard percussion drill that made the hole.       

As the tube of the rock bolt slides into place, the full length of the slot narrows, causing radial pressure to be exerted against the rock over its full contact length.


DimensionsPhysical PropertiesTechnical Data
Bolt DiameterA47mm

Yield Strength

Min. 345 Mpa (120KN)Recommended Normal Bit Size41-45mm
Bolt LengthB0.9-3.0mTypical 445Mpa(150KN)
Taper End DiameterC38mm

Tub eUltimate

Tensile

Strength

Min. 470 Mpa (160KN)Typical   Breaking Capacity178KN
Taper Slot WideD2mmTypical 530Mpa(180KN)
Taper LengthE100mm

Mass pe

Meter

2.71 KgsMin. Breaking Capacity133KN
Bolt Slot WideF25mm
Ring LocationG8mm

Cross Section     

Area

345 mm²Recommended Initial Anchorage  6-10 Tons   (53-89 KN)
Material GuageH3/3.2mm
Ring Wire GuageI8mmHole Diameter Range43-45.5mmUltimate Axial StrainTypical 21% (Thk<16mm)
Ring Open GapJ6-7mm


Composition

Split set rock bolt can be load tested by fitting a special ring to the bolt prior to its installation.  Pull tests can then be conducted with a hollow ram hydraulic jack.

Further corrosion protection can be provided by hot dip galvanizing.

The same as the self-drilling anchor bolt the surface treatment methods can be hot-dip galvanized, electro-galvanized or surface epoxy coating, and all need to be used with Volcano Plate.

Split set rock bolt

Installation

The JIUFU Underground Split set rock bolt is manufactured from high strength steel tube which has a slot along its entire length.   A ring, or collar, is welded on the outer end to hold a domed plate to the rock surface.

Friction Bolts-Split set rock bolt

Advantages

Split set rock bolt Product Features

1.The raw material is made of high-strength alloy steel strip.

2.The installation is the simple.

3.No anchoring agent is required.

4.The friction strength between the bolt and the rock is large.

5.It has high shear and tensile strength.

6.Equipped with a high-strength plate.