Details:

Personal Author:
Gearhart, D. ;
Corporate Authors:
National Institute for Occupational Safety and Health ;
Conference Authors:
Society for Mining, Metallurgy, and Exploration (U.S.). Meeting (2007 February : Denver, CO) ;
Description:
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 cpacity 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.
Subject:
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Mining

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;
Document Type:
Book Chapter ;
Genre:
Conference Publications ;
Collection(s):
National Institute for Occupational Safety and Health
Main Document Checksum:
[+]
urn:sha256:b47333d6d83866e69a788a7c6dd78c687c388ff24c8b9afe8188bf323f54e87b
File Type:

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