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Mining Publication: Technology News 476 - Instrumented King Wire for Monitoring Cable Bolts
Keywords: Cable bolts Mechanical strain Roof falls Strain gauges
Original creation date: November 1998
Authors: LA Martin, RP Curtin
Technology News - November 1998
Download PDF Document (1.13 MB)
NIOSHTIC2 Number: 20000645
U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Technology News 476, 1998 Nov :1-2
A cable bolt can be a strain-measuring device as well as a supporting device in underground mines. Placing instruments on a cable bolt allows certain characteristics of a rock mass, such as high strain and load, to be evaluated during mining and provides a means for mining engineers and mine inspectors to forecast a potential roof fall. Thousands of cable bolts are installed in U.S. mines each year. Studies performed by NIOSH researches show that support loads can exceed the yield point of the steel, which can result in unstable ground conditions that pose direct safety hazards for underground workers. Rock falls can also create secondary hazards, such as carved escape ways and blocked ventilation passages. Development of methods and tools to assist in the evaluation and selection of rock supports could reduce the number of unplanned rock falls significantly.
Image of publication Technology News 476 - Instrumented King Wire for Monitoring Cable BoltsTechnology News - November 1998
Download PDF Document (1.13 MB)
NIOSHTIC2 Number: 20000645
U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Technology News 476, 1998 Nov :1-2
See Also
Bolt Load Changes During Initial Face Advance and Cross-Cut Breakthrough
A Case Study of Bolt Performance in a Two-entry Gate Road
Determination of Physical Properties of Cable Bolts in Cement Grout Pull Tests Using Instrumented King Wires
Evaluation of Instrumented Cable Bolts in Cement Grout to Determine Physical and Numerical Modeling Properties
Ground Response to High Horizontal Stresses During Longwall Retreat and its Implications for Longwall Headgate Support
Make it Safer with Roof Screen
Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Technology News 483 - Safety Training Tools for Rock Scaling Personnel
Updating the NIOSH Support Technology Optimization Program (STOP) With New Support Technologies and Additional Design Features
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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