General Features

• The MP Bolt consists of a bar thread, specially designed expansion shell and drive nut.
• The MP Bolt Expansion Shell (patent pending) has been designed to reduce the grout resistance upon bolt installation.
• The MP Bolt provides immediate rock reinforcement through mechanical anchorage while the grout cures.
• The MP Bolt bar is hot rolled with deformations that form a course left hand thread (10mm pitch) over its entire length.
• Single pass bolt installation.
• The thread bar form provides good load transfer properties.
• Corrosion protection provided by full column grout.
• Provides immediate support.
• Drive nut ensures reliable setting of the Expansion Shell and provides a bolt tail for subsequent meshing.
• Additional corrosion protection may be provided by hot dip galvanizing. (Refer to Section G).

Installation Guidelines

• 35mm hole diameter are preferred.
• The drilled hole length must be longer than the bolt by approximately 50mm.
• Appropriate components are fitted to the bolt. The Expansion Shell is screwed onto the bolt until the bolt thread just protudes through the Expansion Shell plug.
• The hole is pregrouted by retracting the hose from the toe to the collar.
  The bolt is inserted through the grout.
• After placing the bolt in the hole to its full length, the bolt is rotated to set the expansion shell and apply tension.

Standard Lengths & Packaging

• Standard bolt lengths range from 600 to 5000mm in increments of 300mm.
• Non-standard requirements are available by negotiation.
• Bolts are packaged in bundles with threads protected by heavy duty polyethylene bags.
• Bolt fittings, such as nuts, ant-friction washers and dome balls, are supplied fitted to rock bolts in the configuration requested.

Notes

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