Split sets / friction anchors have been used as a primary roof support in the underground mining environment for many years. The anchor consists of an open seamed high tensile Supraform S420 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 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.

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Key Advantages of using Split Sets

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

Pull testing on the split set friction anchors proves their superiority in anchoring themselves inside the drilled hole. Once the product has been installed, the spring loading allows the anchor to adapt to minor changes in the ground conditions. This is an important advantage over inelastic bolts that are unable to adapt to changing ground conditions.

The split set is a popular choice due to its easy installation. Once the hole is drilled, the driver tool drives the anchor into the wall. Installation time is typically less than a minute and there is no waiting time for grout to set, no tightening or torqueing and no ongoing maintenance is needed after installation. This saves time, labour and additional grouting or resin expenses.

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Mining and Ground Support

Split Set® friction rock stabilizers are used for underground or surface support in many applications:

Underground Mine Roof Support & Mine Roof Bolting

Every kind of underground mine uses Split Set® friction rock bolts for mining and ground support. Miners use them for mine roof bolting and mine roof support as well as to pin mesh, hang conveyors, hold pipes, and cables, secure rails in place, and for other needs.

Ground Support for Tunnels and Other Excavations

Split Set® stabilizers have solved many problems for contractors in construction and in maintaining railway and road tunnels, hydropower tunnels, powerhouse and storage caverns, shafts, water and sewage tunnels, and others.

Ground Support for Surface Jobs Split Sets are being used more often for above ground applications or anywhere reliable ground stabilization is needed. Open-pit mine and quarry operators use them to stabilize high walls for the most effective mine and ground support. Open-pit miners find that using Split Set® stabilizers with mesh can permit a steeper mining angle, reducing overburden removal.

Contractors find Split Set® friction rock stabilizers ideal for attaching screen to control spalling cuts. Construction contractors use them with mesh to tie back the ground and contain rock falls on steep highway cuts, as well as in building excavations.

For more information, please visit Mesh Bolt.

Varied Applications for Split Set® Rock Bolt Systems where Stabilize, Hold and Control are Necessary

• Mine roof and ribs
• Pillars
• Water tunnels
• Shaft walls
• Sewage tunnels
• Underground storage caverns

• Road tunnels
• Pipe and ventilation ducts
• Conveyor belts
• Trolley wires
• Surface excavation slopes
• Highway cuts

Contact us for examples of applications where the Split Set® friction rock stabilizers utilized in mining and ground support have also solved problems for contractors working on tunnels, sewers, reservoirs, quarries and other rock and mine support areas.

Download specifications in pdf format for:
Model SS-33 is 1.3 inches (33 mm) in diameter.
Model SS-39 is 1.5 inches (39 mm) in diameter.
Model SS-46 is 1.8 inches (46 mm) in diameter.

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