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Mining Publication: New Tools for Roof Support Evaluation and Design
Keywords: Data loggers Strain gauges Support design and selection
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: August 2003
Authors: SP Signer, CB Sunderman
Conference Paper - August 2003
Download PDF Document (0.52 MB)
NIOSHTIC2 Number: 20024111
In: S. S. Peng, C. Mark, A. Wahab Khair, and K. Heasley, eds., Proceedings: 22nd International Conference on Ground Control in Mining (Aug. 5-7, 2003; Morgantown WV), Dept. of Mining Engineering, West Virginia University, 2003 Aug; :114-118
Researchers at the National Institute for Occupational Safety and Health (NIOSH) have developed several new tools for evaluating roof support performance. A miniature data acquisition system (MIDAS) was developed that can collect readings from up to 16 strain gauges at regular time intervals and store the readings for later retrieval. Three LED lights change from green to yellow, then red, based on the reading levels and/or rates of change of rock movement. This feature can be used to warn miners of rock instabilities. The system can be used with any strain-gauged support (resin bolt, friction bolt, cable bolt) or with a newly developed rock strain strip (ROSS) developed by NIOSH to measure rock strain. A ROSS is grouted in a hole drilled adjacent to the rock support to be evaluated; the deformed shape of the ROSS provides anchorage on either side of the strain gauges. Data from both laboratory tests and field evaluations are presented that describe the capabilities of both the MIDAS and ROSS instruments.
Image of publication New Tools for Roof Support Evaluation and DesignConference Paper - August 2003
Download PDF Document (0.52 MB)
NIOSHTIC2 Number: 20024111
In: S. S. Peng, C. Mark, A. Wahab Khair, and K. Heasley, eds., Proceedings: 22nd International Conference on Ground Control in Mining (Aug. 5-7, 2003; Morgantown WV), Dept. of Mining Engineering, West Virginia University, 2003 Aug; :114-118
See Also
Bolt Load Changes During Initial Face Advance and Cross-Cut Breakthrough
Determination of In Situ Deformation Modulus for Cemented Rockfill
Determination of Physical Properties of Cable Bolts in Cement Grout Pull Tests Using Instrumented King Wires
Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines
Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Pillar and Roof Span Design Guidelines for Underground Stone Mines
Technology News 482 - Ground Support Safety Training Video
Tests of Fibre-Reinforced Shotcrete at the Chief Joseph Mine, Butte, Montana
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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