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Mining Publication: Application of Parametric Column Analysis to Evaluate Eccentric Loading Conditions on Prop Support Performance
Keywords: Axial tests Posts
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: February 2007
Authors: DF Gearhart
Conference Paper - February 2007
Download PDF Document (0.30 MB)
NIOSHTIC2 Number: 20031649
2007 SME Annual Meeting and Exhibit, February 25-28, Denver, Colorado, preprint 07-105. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2007 Feb; :1-8
Full-scale tests are conducted on mine roof supports using protocols developed by the National Institute for Occupational Safety and Health (NIOSH) using the unique capabilities of the Mine Roof Simulator (MRS). These protocols simulate the loading conditions that the support will be exposed to in an underground mine to determine the performance capabilities and limitations of the support. Some tests are conducted with rigid boundary conditions, creating uniform contact and near ideal axial loading conditions. These tests are used to determine the ultimate performance potential of a support, including the strength, stiffness, and stability. For prop supports where stability is a critical design issue, tests are implemented to induce buckling by a modified end condition, eccentric contact, or biaxial loading. It is important to determine the capacity of the support design when the support is subjected to unpredictable loading conditions. This paper examines the effect of end conditions and load profiles on prop support performance and applies a new analysis methodology based on eccentric loading to determine a factor of safety for load capacity. Recommendations for installation practices that minimize eccentricity and therefore preserve capacity are also provided.
Image of publication Application of Parametric Column Analysis to Evaluate Eccentric Loading Conditions on Prop Support PerformanceConference Paper - February 2007
Download PDF Document (0.30 MB)
NIOSHTIC2 Number: 20031649
2007 SME Annual Meeting and Exhibit, February 25-28, Denver, Colorado, preprint 07-105. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2007 Feb; :1-8
See Also
Roof Bolt Response to Shear Stress: Laboratory Analysis
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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