What is Swellex bolt?
Rock bolts Since its introduction 30 years ago the Swellex expandable rock-bolting system has gained wide recognition in the mining and tunneling industry. This unique rock bolt consists of a welded tube folded in upon itself, sealed at one end.
What is Swellex?
Swellex™ is a silicone tubing swelling fluid which is a time-saving product from MicroCare Medical™. This makes assembly faster and easier when connecting thin wall tubing to barbed fittings. Once the tube is in place, the swelling fluid evaporates completely.
What is SN type rock bolt?
SN-Bolts/ Rock Bolts: Store-Norfors-Anchors (named after the first place of installation) popularly known as SN-Anchors are mortar embedded concrete reinforcement steel anchors and are used for rock reinforcement in underground Mining and Tunneling.
What is rock bolts & types?
Rock bolts are a type of drilled soil nail or anchor used when the ground to be stabilized consists mostly of rock materials. These types of inclusions are typically grouted in place and posttensioned, similar to soil anchors (Figure 15.8).
How does a Swellex bolt work?
Swellex rock bolting system It is a unique rock bolt, as it is made out of a welded tube folded onto itself and sealed at one extremity. It is re-expanded using a high pressure water flow provided by a special pump and adapter. The bolt is expanded inside the borehole drilled into the excavation wall.
What is the purpose of cement grout in rock bolt installation?
While this is not required in temporary support applications, grouting should be considered where the ground-water is likely to induce corrosion or where the bolts are required to perform a ‘permanent’ support function.
What are the different types of bolts used for rock bolting?
What are the Types of Rock Bolts?
- Grout-Anchored Rock Bolt. A grouted rock bolt is a threaded bar made of steel, or rebar bolts.
- Cable Bolts.
- Hollow Rock Bolts.
- Self-Drilling Rock Bolt.
- Mechanically Anchored Rock Bolts.
- Friction-Anchored Rock Bolts.
- MDX Bolt.
- Fiber-Reinforced Polymer Composite Rock Bolts.
Why is rock bolting done in rocks?
rock bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Rock bolt reinforcement can be used in any excavation geometry, is simple and quick to apply, and is relatively inexpensive.
What is roof bolting?
A system of roof support in mines. Boreholes usually from 3 to 12 ft (1 to 4 m) long are drilled upward in the roof, and bolts of 5/8 to 1 in (2 to 2.5 cm) or more in diameter are inserted into the holes and anchored at the top by a split cone, mechanical anchor, or resin grout.
Which is a type of rock bolt?
The most common grout-anchored rock bolt is the fully grouted rebar, a threaded bar made of steel. Cement or resin is used as the grouting agent. A cable bolt is a reinforcing element made of steel wires in the form of a strand or rope; it is installed in the borehole with cement grout.