SSAB Virsbolt expandable rock bolt is the instant solution for rock reinforcing in underground mines and tunnels. Just add water, no chemicals. It’s the safest and most environmentally friendly way to speed up your tunneling operation.
Contact sales Download product informationSSAB Virsbolt is stocked in several parts of the world to ensure fast deliveries. SSAB Virsbolt is delivered bundled for easy handling and transporting.
.jpg?m=20231024070203)
.jpg?m=20231024070201)
.jpg?m=20231024070207)
SSAB Virsbolt and SSAB Virsbolt+ can be delivered with corrosion protection from a polymer alloy coating. This will save a step in your production and thereby time and money.
.jpg?m=20231024070157)
SSAB Virsbolt is the fastest way to secure the rock roof when tunneling and mining in both soft and hard rock. The bolts are not sensitive to variations in drill hole diameter.
.jpg?m=20231024070158)
When the hole is drilled, the folded rock bolt is inserted and expanded with water from a high-pressure pump. As soon as the bolt is expanded it squeezes tightly against the rock. The load is carried immediately – no waiting for grout or resin to harden.
.jpg?m=20231024070159)
SSAB Virsbolt is made of a steel with exceptional formability properties, ensuring a safe and reliable performance in different rock conditions.
The expandable rock bolt is an ingenuous concept. The omega-shaped tube introduced a brand-new way of securing rock roofs from caving in. It’s a tried and tested technology used all over the world.
SSAB Virsbolt is made exclusively with high-quality steel from the Nordics and manufactured at an SSAB plant in Sweden. The whole production chain from iron ore to finished bolt is controlled by SSAB. The steel used is clean with consistent properties and extremely good elongation, necessary properties to achieve the rock bolt’s reinforcing qualities.
Since SSAB Virsbolt is installed by just using water, there are no potential hazards from chemicals to worry about during installation or afterwards. The pure steel bolts can remain in the rock without giving any environmental impact.
.jpg?m=20231024070209)
.jpg?m=20231024070211)
SSAB Virsbolt is delivered ready to use. The folded tube has a closed bushing at the top and a connector bushing at the end, where the pressure hose is attached. The high-pressure water inflates the bolt until it squeezes tight to the hole’s wall.
The whole procedure is simple and straightforward in all kinds of tunneling and mining operations. The method is suitable for both mechanized and manual installation, and the equipment needed is easy to move around and power.
SSAB Virsbolt is also available in a corrosion-resistant coated version.
| Virsbolt 240 light | Virsbolt 240+ | Virsbolt 240 | Virsbolt 160+ | Virsbolt 160 | Virsbolt 120+ | Virsbolt 120 | |
|---|---|---|---|---|---|---|---|
| Bolt diameter | 38 mm | 38 mm | 38 mm | 38 mm | 38 mm | 28 mm | 28 mm |
| Profile diameter | 36 mm | 36 mm | 36 mm | 36 mm | 36 mm | 27.5 mm | 27.5 mm |
| Material thickness | 2.3 mm | 3 mm | 3 mm | 2 mm | 2 mm | 2 mm | 2 mm |
| Upper bushing diameter | 38 mm | 38 mm | 38 mm | 38 mm | 38 mm | 28 mm | 28 mm |
| Inflation bushing diameter | 41/48 mm | 41/48 mm | 41/48 mm | 41/48 mm | 41/48 mm | 30/37 mm | 30/37 mm |
| Hole diameter | 43 - 52 mm | 43 - 52 mm | 43 - 52 mm | 43 - 52 mm | 43 - 52 mm | 32 - 39 mm | 32 - 39 mm |
| Minimum breaking load | 240 kN |
230 kN |
240 kN | 160 kN | 160 kN | 120 kN | 120 kN |
| Minimum elongation | 10 % | 25 % | 15 % | 25 % | 15 % | 25 % | 15 % |
| Typical elongation | 20 % | 30 % | 20 % | 30 % | 20 % | 30 % | 20 % |
| Weight | 3.1 kg/m | 4.0 kg/m | 4.0 kg/m | 2.8 kg/m | 2.8 kg/m | 2.0 kg/m | 2.0 kg/m |
| Standard length* | 2.4 - 6.0 m | 2.4 - 6.0 m | 2.4 - 6.0 m | 2.4 - 6.0 m | 2.4 - 6.0 m | 1.5 - 4.0 m | 1.5 - 4.0 m |
*other lengths upon request
For information and ordering, fill in the form and we will contact you.