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.

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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.

Dimensions

Physical Properties

Technical Data

Bolt Diameter

47mm

Yield Strength

Min. 345 Mpa (120KN)

Recommended Normal Bit Size

41-45mm

Bolt Length

0.9-3.0m

Typical 445Mpa(150KN)

Taper End Diameter

38mm

Tub eUltimate

Tensile

Strength

Min. 470 Mpa (160KN)

Typical Breaking Capacity

178KN

Taper Slot Wide

2mm

Typical 530Mpa(180KN)

Taper Length

100mm

Mass pe

Meter

2.71 Kgs

Min. Breaking Capacity

133KN

Bolt Slot Wide

25mm

Ring Location

8mm

Cross Section

Area

345 mm²

Recommended Initial Anchorage

6-10 Tons (53-89 KN)

Material Guage

3/3.2mm

Ring Wire Guage

8mm

Hole Diameter Range

43-45.5mm

Ultimate Axial Strain

Typical 21% (Thk<16mm)

Ring Open Gap

6-7mm

Composition

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

Installation

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