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Description

  • A self-drilling rock bolt is developed to address a risk of damaging the rod of drilling equipment caused by clastic rock in fractured or weathered rock zones.

Features

  • A drill bit installed at the end of the bolt
  • Grout injected through the center hole of a hollow rock bolt
  • Suitable for rock mass with collapsing boreholes

Drill Bit

  • Large air outlets for effective slime discharge and mortar injection
  • Cross bits for clastic rocks
  • Button bits for hard rocks

Hollow Bar

  • Mortar insertion without removing the bar
  • Length up to 6m
  • R25, 28, 32 fully threaded bar
  • Tensile load of R25 bar : 13,000kg or more

Coupler

  • Connects two hollow bars together
  • Uses the same or stronger material as hollow bars

Subcomponents

Ring Nut Hexagon Nut Convex Plate Flat Plate

Specification

Product Diameter(mm) Length(m) Thread shape Tensile Load(ton) Design Load(ton)
R28 28.3 3-6 Rope Thread 17.5 15.5
R32 31.3 3-6 Rope Thread 20 18