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Mining Publication: A Method for the Selection of Rock Support Based on Bolt Loading Measurements
Keywords: Roof bolts 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 1997
Authors: SP Signer, D Cox, JL Johnston
Conference Paper - August 1997
Download PDF Document (0.44 MB)
NIOSHTIC2 Number: 20024501
Proceedings of the 16th International Conference on Ground Control in Mining, Peng SS, ed., Morgantown, West Virginia: West Virginia University, 1997 Aug; :183-190
A method to assist in the evaluation and selection of roof bolts using in situ measurements of roof bolt loading has been developed by researchers of the Spokane Research Center, National Institute for Occupational Safety and Health. Both axial and bending forces are measured by strain gauges at many locations along the length of fully grouted bolts during various stages of mining. This information is then used to (1) predict bolt loading for variations in bolt spacing, grade, and diameter, (2) calculate the design changes necessary in zones where bending loads are high, and (3) determine if bolt length is adequate. Results from several case studies of full-column bolt loading in coal mine gate roads are use to illustrate the design method. This knowledge will give design engineers a tool for the selection of roof support systems that will improve underground safety by reducing roofbolt failures.
Image of publication A Method for the Selection of Rock Support Based on Bolt Loading MeasurementsConference Paper - August 1997
Download PDF Document (0.44 MB)
NIOSHTIC2 Number: 20024501
Proceedings of the 16th International Conference on Ground Control in Mining, Peng SS, ed., Morgantown, West Virginia: West Virginia University, 1997 Aug; :183-190
See Also
ARBS - Analysis of Roof Bolt Systems - 2.5.02
Design of Primary Roof Support Systems in U.S. Coal Mines Based on the Analysis of Roof Fall Rates
The Introduction of Roof Bolting to U.S. Underground Coal Mines (1948-1960): A Cautionary Tale
Loading Characteristics of Mechanical Rib Bolts Determined Through Testing and Numerical Modeling
Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
Pillar and Roof Span Design Guidelines for Underground Stone Mines
Preventing Falls of Ground in Coal Mines With Exceptionally Low-Strength Roof: Two Case Studies
Technology News 482 - Ground Support Safety Training Video
Updating the NIOSH Support Technology Optimization Program (STOP) With New Support Technologies and Additional Design Features
Zen and the Art of Rockbolting
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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