Split set rock bolt

Split set rock bolts 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

Split Set Rock Bolts

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 split set 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



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

Mass pe


2.71 KgsMin. Breaking Capacity133KN
Bolt Slot WideF25mm
Ring LocationG8mm

Cross Section     


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


Split set rock bolts 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 Bolts


The split set rock bolts are manufactured by Jiufu and is used in mines, tunnels, slopes or any underground or ground application that requires reliable ground support. Our friction rock anchor rod can immediately put pressure on the rocks after installing its entire contact length after installation, thereby generating excellent maintenance. When the ground displacement occurs, our anchor rod will adapt to changing ground conditions. As a result, holding tightly becomes stronger with time and ground movement, providing reliable ground support. The friction bolt does not need to be tightened.

Split set rock bolts application:

On the ground

Open-air mines and quarry operators use them to stabilize high walls. The split stabilizer is very suitable for connecting the screen to control the peeling when cutting.

In tunnels and other excavations

The SPLIT SET stabilizer solves many problems in constructing and maintaining railway and highway tunnels, hydropower tunnels, factory buildings and storage caves, wells, water supply and sewage tunnels.

In the underground mine

Each underground mine uses split-type friction rock stabilizers for ground support. Miners also use them to fix the grid, suspension conveyor, fixed pipes and cables, fix the orbit and meet other needs.

As a professional split set rock bolts supplier, JIUFU underground mining split sets are produced 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.

Split Set Rock Bolts


Split set rock bolts 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. The mining split set has high shear and tensile strength.

6. Equipped with a high-strength plate.

If you are looking for high quality wholesale split set rock bolts, please feel free to contact us!