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Application of parametric column analysis to evaluate eccentric loading conditions on prop support performance.

Authors
Gearhart-D
Source
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
Link
NIOSHTIC No.
20031649
Abstract
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.
Keywords
Mining-industry; Underground-mining; Safety-research; Geology; Ground-control
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
20070225
Document Type
Conference/Symposia Proceedings
Fiscal Year
2007
NTIS Accession No.
NTIS Price
NIOSH Division
PRL
Priority Area
Mining
Source Name
2007 SME Annual Meeting and Exhibit, February 25-28, Denver Colorado, Preprint 07-105
State
PA; CO
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