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SMART Cable Bolt Posted by Mine Design Technologies January 31st, 2016
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SMART Cable Bolt

By combining the support capabilities of a standard 7-strand cable bolt with a miniature 6-wire extensometer, the SMART (Stretch Measurement to Assess Reinforcement Tension) Cable was born.

The stretch in the cable is determined via the integrated six-point extensometer, allowing the strain between the anchor points to be calculated. Because we know the properties of the cable-rock-grout interface, the loading profile along the cable can be inferred.

These field-proven instruments allow our clients to optimize their ground support, creating cost-effective excavations at greater depth while ensuring the safety of equipment and personnel. They have also been used in civil tie-backs for design validation.


  • Length: up to 30 m
  • Diameter (head): 33 mm
  • Weight: 1.35 kg/m
  • Borehole diameter: 50 mm minimum
  • Stroke: 63.5, 127, and 190.5 mm
  • Linearity: +/- 2% (1% available upon request)

Features and Benefits

  • Manufactured to match your existing cable support
  • Anchor locations are user-specified
  • Electronic readout head sits inside the collar protecting it from damage
  • Installs like a standard cable bolt
  • Can be monitored WIRELESSLY!


  • Civil tie-back monitoring
  • Strain and load of underground and open pit mining support systems
  • Strain and load measurement in concrete structures