Friction Bolts Split Sets are rock bolts with only 2 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 has a welded ring flange to hold the bearing 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.
|Dimensions||Physical Properties||Technical Data|
|Min. 345 Mpa (120KN)||Recommended Normal Bit Size||41-45mm|
|Bolt Length||B||0.9-3.0m||Typical 445Mpa(150KN)|
|Taper End Diameter||C||38mm|
|Min. 470 Mpa (160KN)||Typical Breaking Capacity||178KN|
|Taper Slot Wide||D||2mm||Typical 530Mpa(180KN)|
|2.71 Kgs||Min. Breaking Capacity||133KN|
|Bolt Slot Wide||F||25mm|
|345 mm²||Recommended Initial Anchorage||6-10 Tons (53-89 KN)|
|Ring Wire Guage||I||8mm||Hole Diameter Range||43-45.5mm||Ultimate Axial Strain||Typical 21% (Thk<16mm)|
|Ring Open Gap||J||6-7mm|