Description
Friction bolt
consists of only two parts, a tube and matching domed bearing
plate. The high strength steel tube is slotted along its length.
One end is tapered for easy insertion into a drill hole and the
other had a welded ring flange to hold the plate. With the bearing
plate in place, the tube is driven into a slightly smaller hole,
using the same standard percussion drill that made the hole. As the
tube of the rock bolt slides into place, the full length of the
slot narrows, causing radial pressure to be exerted against the
rock over its full contact length.
Structure:
1, the tube is made of high-tensile
alloy steel plate;
2, easy to install;
3, no need resins and cement
cartridges;
4, big friction between bolt and
rock;
5, high yield and tensile
strength;
6, high-strength face
plate;
7,the height of tunnel must be
larger than the bolt length.
