Mine rock bolt

01 Sep.,2025

 

Mine rock bolt

Mine rock bolt:Split set bolt/Friction bolt

Split set bolt is a kind of underground mining rock bolt,also known as friction bolt, split set stabilizer.

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Split set bolt is an effective solution for rock support in underground mining, tunnel construction.

It is a high-strength “C” shaped steel bolt with two parts, a tube and a matching domed bearing plate.

One end of the tube 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.

The split set bolt is an effective way to support the rock in underground mining and tunnel construction.

Are you interested in learning more about Split Sets Underground Mining? Contact us today to secure an expert consultation!

Specifications of split set bolt

Mine /tunnel rock bolt:Thread rebar bolt

Thread rebar bolts typically consist of a cylindrical shaft with external threading along its length. The threading is typically in the form of helical ridges or grooves that spiral around the bolt’s surface. This threading allows the bolt to securely grip the surrounding material when installed, providing enhanced stability and load-bearing capacity.

Threaded bar bolts come in various lengths, diameters, and thread sizes to suit different requirements. They are commonly made from materials such as steel, stainless steel, or brass, depending on the specific application’s needs for strength, corrosion resistance, or other properties. These rods are often used to create a fastening connection between two objects or components, providing stability, support, or alignment.

Self drilling rock bolt

1. Anchor head: The barbs on the anchor head locate the anchor rod in the drilled hole and ensure that the rod is well centered.

2. Anchor rod body: an important building block in the assembly, which plays a major role in anchoring and support.

3. Slurry stopper: maintain the slurry pressure during the grouting process, so that the slurry is fully filled into the gap of the surrounding rock.

4. Plate: to bear the greater stress of the surrounding rock. 5. Nut: to concentrate the stress of the surrounding rock on the plate

For more information, please visit Split Set Mining Systems.

Split Set, Friction Bolt, Split Set Stabilizer Manufacturers in India

SPLIT SET / FRICTION STABILIZER / FRICTION BOLT

SPLIT SET / FRICTION STABILIZER / FRICTION BOLT

Daman Pipe is manufacturer and exporter of Split Sets / Friction Bolt along with Domed Bearing Plate and Combi Washers for underground mining and civil engineering projects.

Split Sets / Friction Bolts have been used as a primary roof support in the underground mining environment for many years. The Split Set consists of an open seamed high tensile steel tube with a face plate. One end is tapered for easy insertion into a pre-drilled hole. It is installed by driving the assembly into a marginally smaller hole than the split sets diameter and the welded steel ring then provides the necessary support to hold the washer plate in place. The split set then uses friction to anchor itself along the whole length of the bolt by relying on the radial spring force generated through compression of the tube. Split set technology is used worldwide by many mines for an extensive variety of mining applications.

Key Advantages of using Split Sets

- Fast and easy installation
- Full length support
- Effective support at any angle
- Axial and radial support
- No torqueing or re-torqueing
- No special equipment is required
- Improved rock stability












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