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Mining Publication: The Effect of Standing Support Stiffness on Primary and Secondary Bolting Systems
Keywords: Cribs Field measurement Modeling Roof bolts
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: August 2003
Authors: SC Tadolini, TM Barczak, Y Zhang
Conference Paper - August 2003
Download PDF Document (0.25 MB)
NIOSHTIC2 Number: 20023435
In: Peng SS, Mark C, Khair AW, Heasley KA, eds. Proceedings of the 22nd International Conference on Ground Control in Mining. Morgantown, WV: West Virginia University, 2003 Aug; :300-307
Standing crib supports have been applied in underground mining programs to resist large roof movements and sustain highloads. The strength and deformation capability of these systems has been documented under both laboratory and field conditions. The parameter that has not been examined and is not well understood is the effect that a crib or other types of standing support has on the primary and secondary bolting systems. A crib support system with low system stiffness may allow large amounts of closure and deformation and cause the bolting systems to yield or even fail. Conversely, cribs or standing support that are too stiff may experience brittle or buckling failures, negating the advantage of the intrinsic supports previously installed. Utilizing a combination of field measurements and 3-dimensional finite element modeling techniques, the relationship between system stiffness and the subsequent performance of the installed bolting system is evaluated. Additionally, a simple method for calculating the combined system stiffness for standing supports, when using materials with different strengths such as steel, concrete, wood, etc., is presented.
Image of publication The Effect of Standing Support Stiffness on Primary and Secondary Bolting SystemsConference Paper - August 2003
Download PDF Document (0.25 MB)
NIOSHTIC2 Number: 20023435
In: Peng SS, Mark C, Khair AW, Heasley KA, eds. Proceedings of the 22nd International Conference on Ground Control in Mining. Morgantown, WV: West Virginia University, 2003 Aug; :300-307
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Experimental and Modeling Investigation of the Effect of Ventilation on Smoke Rollback in a Mine Entry
Modeling and Data Analysis of 50 to 5000 kHz Radio Wave Propagation in Coal Mines
Preventing Falls of Ground in Coal Mines With Exceptionally Low-Strength Roof: Two Case Studies
Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
Variation of Horizontal Stresses and Strains in Mines in Bedded Deposits in the Eastern and Midwestern United States
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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