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Method for the selection of rock support based on bolt loading measurements.

Authors
Signer-SP; Cox-DJ; Johnston-JL
Source
Proceedings of the 16th International Conference on Ground Control in Mining, August 5-7, 1997, Morgantown, West Virginia. Peng SS, Holland CT, eds., Morgantown, WV: West Virginia University, 1997 Aug; :183-190
Link
NIOSHTIC No.
20024501
Abstract
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.
Keywords
Mining-industry; Underground-mining; Rock-falls; Ground-control; Ground-stability
Publication Date
19970805
Document Type
Conference/Symposia Proceedings
Editors
Peng-SS; Holland-CT
Fiscal Year
1997
NTIS Accession No.
NTIS Price
ISBN No.
0939084569
NIOSH Division
SRL
Source Name
Proceedings of the 16th International Conference on Ground Control in Mining, August 5-7, 1997, Morgantown, West Virginia
State
WA;; WV
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