split set bolt installation

Split set rock bolt can be load tested by fitting a special ring to the bolt prior to its installation. Pull tests can then be conducted with a hollow ram hydraulic jack. 2.The installation is the simple. 3.No anchoring agent is required. 4.The friction strength between the bolt and the rock is large. 5.It has high shear and tensile strength.

Drill a hole slightly smaller in diameter than the Split Set stabiliser. · Ensure that the hole is drilled slightly deeper than the complete length of the bolt.

Load cells were placed on the head end of the bolts to determine head loads. Head loads up to 14.7 kN (3,300 Ib) were generated during bolt installation. In 

Split-SetK Bolt and Elliptical Bolt Sets *.****.*o* 94 Company of Butte, Montana, began making rock bolt installations in 1939. In.

This paper shows that Jumbo installation of expanding friction rockbolts is now possible with the same ease as traditional 'Split Set' style friction bolts.

Many underground mining operations use Split Set friction stabilizer bolts for rock support. Currently, however, little has been done to quantify the 

Dec 31,  · Installation Quality Guidelines of Split Set Stabilizer Friction Bolts. -12-31. The following are items to be aware of when using/installing friction stabilizers: Type of Ground - The nature of the ground must be evaluated. Soft strata requires a longer anchorage length to be effective. Soft ground results in larger hole sizes for a given

Split Set / Friction Bolts are available in 33mm, 39mm, 41mm and 46mm diameters in a variety of lengths to suit the application of the mine. The domed bearing washer plates are available in 125 x 125 x 4mm and 150mm x 150mm x 4mm as well as the Combi Washer Plate 300mm x 270mm x 1.6mm.

Installation. The JIUFU Underground Split set rock bolt is manufactured from high strength steel tube which has a slot along its entire length. A ring, or 

Split Set / Friction Bolts are available in 33mm, 39mm, 41mm and 46mm diameters in a variety of lengths to suit the application of the mine. The domed bearing washer plates are available in 125 x 125 x 4mm and 150mm x 150mm x 4mm as well as the Combi Washer Plate 300mm x 270mm x 1.6mm.

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.