Cable Bolts

Cable bolts
Cable bolts are designed to be used in ground and rock reinforcement near mining excavations and in particular near workings in weak strata with lower strength or entering mining pressure zones.

Cable bolts are made from cable of fi-15,5 mm and 1+6 structure in accordance with PN-71/M-80236. The following types of bolt can be distinguished: Plain cable, Bulbed cable.

The cable lay of KL-15,5K bolt was modified to form birdcage like bulbs of 100mm in length and 26 ÷ 28 mm in diameter. This ensures a better force distribution affecting the cement grout around the cable.

When filled with grout the cages act like stiff bulbs in relation to the cement face. The bulbs remain non-cracked despite considerable forces affecting the cable as radial forces occurring in the wires, which could potentially crush the cement in the bulbs, are relatively light when compared to axial forces.

For mining, tunneling and construction industry,  cable bolts bolting system.
The shape of the cable considerably affects force distribution around the cable caused by cable displacement in the rock. The bulbs cause considerable forces perpendicular to the hole wall compressing the grout and at the same time reduce compressive forces parallel to the hole axis. As a result cage cables bolts perform better in the rock, i.e. cable displacement in the rock, caused by load intensity, is smaller when compared to plain cable.

Fasteners

* A cap screw, as used in a bolted joint
* Bolt (climbing), an anchor point used in rock climbing
* Deadbolt, a kind of locking mechanism
* Screw, a cylindrical threaded fastener
* Several fasteners used in boat building

Bolted joints
Bolted joints are one of the most common elements in construction and machine design. They consist of cap screws or studs that capture and join other parts, and are secured with the mating of screw threads.

There are two main types of bolted joint designs. In one method the bolt is tightened to a calculated torque, producing a clamp load. The joint will be designed such that the clamp load is never overcome by the forces acting on the joint (and therefore the joined parts see no relative motion).

The other type of bolted joint does not have a designed clamp load but relies on the shear strength of the bolt shaft. This may include clevis linkages, joints that can move, and joints that rely on locking mechanism (like lock washers, thread adhesives, and lock nuts).