Friction hollow anchor bar consists of two parts, a tube and matching domed bearing plate. It is mainly used as a good ground support products in coal mines, copper mines, subways and tunnels, etc.
During the using process, immediate ground support is good for friction rock bolt. But soft rock strtas is not so suitable. so, permanent support and roof support is also not recommended.
The Drilling Hole for Friction Rock Bolt should be cleaned and examined to ensure the friction bolt will insert smoothly. Variation in hole daimeters(due to differing strentths of rock strata or excessively gragmented ground) can yield variations in anchorage capacities at various elevations.
Sinorock Friction anchor bolt completed with dome plate has very high strength split tube with welded ring, which guarantees for very good & typical Lab Pull Test.
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