CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.
As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
i
Application Of Parametric Column Analysis To Evaluate Eccentric Loading Conditions On Prop Support Performance
-
2007
-
By 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
[PDF-303.81 KB]
Details:
-
Personal Author:
-
Corporate Authors:
-
Conference Authors:
-
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.
-
Subjects:
-
Source:
-
Document Type:
-
Genre:
-
CIO:
-
NIOSHTIC Number:nn:20031649
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type: