General Features

• The Post Groutable Ultrastrand Bolt is a high tensile and shear load capacity strand bolt. It is a cable designed to be installed as a long rock bolt which is capable of being post-tensioned at the face, or outbye, to loads of up to 25 tones using the DSI Tensioner Unit.
• The Post Groutable Ultrastrand Bolt is manufactured from 19 wire strands, for mixing chemical anchors, welded to one end of the strand and is available in any length up to 10 metres.
• A breather tube is permanently fixed along the length of the cable with metal tips.
• The Post Groutable Ultrastrand Bolt has a special collar and segmented wedge, which can sustain collar loads of between 52 and 55 tones.
  The Bolt features a resin protection device to ensure the breather tube remains clear.
• The Post Groutable Ultrastrand Bolt concept allows a longer than seam height bolt to be installed at up to 30* from the vertical at the face, or outbye, to supplement existing strata reinforcement. Compatible domed plates are available to be used with the Post Groutable Ultrastrand Bolt.
• The bolt can be post grouted immediately or at any time later using standard grouting equipment.
• Provides very efficient anchorage at the very top end of the bolt using a unique combination of bulbs. The length of the bolt is bulbed for enhanced load transfer. These bulbs have ball bearings inside to ensure the bulb remains in tack during tensioning.
• Anchorage strength of the resin grouted top end of the bolt exceeds bolt tensile strength in typical rock conditions.

Installation Guidelines

• Drill 42-45mm diameter hole for the length of the bolt.
• Insert resin. Each cartridge should be pushed to the back of the hole using a resin inserter.
• Install the Post Groutable Ultrastrand Bolt in the same way the standard Ultrastrand Bolt is installed, ie. push and spin into the resin.
• Loosely assemble the plate with a grout hole and the collar and wedges onto the bolt.
• Push grout tube through the grout hole in the plate.
• Pre-tension the bolt to the required load.
• Pump thixotropic grout.

Standard Lengths & Packaging

• Post Groutable Ultrastrand Bolt typical lengths range from 4100 to 8100mm.
• Collar/wedge assemblies are supplied separately to the bolt.
• Non-standard requirements are available by negotiation.
• 4100 to 8100mm long Post Groutable Ultrastrand Bolts are strapped in bundles of 50 and supplied on steel trays.
• Assistance should be sought from DSI Technical Service Engineers for selecting the correct Post Groutable Ultrastrand Bolt fittings for the application and correct product codes.

Notes

• Only DSI rock bolt components should be used in order to obtain full performance of the bolt system.
• Stiffening tubes to assist in installation are also available.
• DSI's Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.