Fields of Application
- Systematic reinforcement in Underground excavations
- Generally used for temporary ground control purposes
- Bolting in medium to hard ground
- Supplementary and utility bolting
Friction stabilizers are mainly used for rock reinforcement in Underground Mining. The shaft of the friction stabilizer consists of a metal strip which is folded to form a slotted tube. The bolt is installed into a borehole by applying impact energy. The borehole features a slightly smaller diameter than the outer diameter of the bolt tube.
The principle of this bolting system is based on the bond between the borehole and the tubular bolt shaft, caused by applying a force onto the borehole wall, which generates a frictional resistance in axial direction.
Recently, a self-drilling friction bolt system, the POWER SET self-drilling friction bolt, has been developed by DSI Underground in addition to conventional friction stabilizers.