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Mining Publication: UDEC Modeling of an Underground Opening in a Rock Mass of Varying Quality
Keywords: Modeling Support design and selection
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: May 2004
Authors: TJ Lasich, MM MacLaughlin, TM Brady
Conference Paper - May 2004
Download PDF Document (0.32 MB)
NIOSHTIC2 Number: 20034508
In: MacLaughlin M, McNearny R, eds. Proceedings of the 39th Symposium on Engineering Geology and Geotechnical Engineering: Research to Practice (Butte, MT, May 18-19, 2004). Butte, MT: Montana Tech of the University of Montana, 2004; :353-358
This project involved modeling rock masses with varying Rock Mass Rating (RMR) values to determine the degree of instability that develops around an underground opening as a function of RMR. The modeling was performed using the Itasca UDEC distinct element software, which allows explicit modeling of blocks of rock and how they interact with each other. The analyses included three different orientations of the joint sets, four different joint spacings and three different values of joint strength, which combine for a total of 36 different combinations of model parameters. Two different modes of behavior were observed: local failure of area immediately surrounding the roof and sides of the opening, and deep-seated failure extending a large distance beyond the opening. Quantification of the size of the unstable area that developed provides numerical validation of empirical guidelines used in design of ground support and instrumented monitoring systems.
Image of publication UDEC Modeling of an Underground Opening in a Rock Mass of Varying QualityConference Paper - May 2004
Download PDF Document (0.32 MB)
NIOSHTIC2 Number: 20034508
In: MacLaughlin M, McNearny R, eds. Proceedings of the 39th Symposium on Engineering Geology and Geotechnical Engineering: Research to Practice (Butte, MT, May 18-19, 2004). Butte, MT: Montana Tech of the University of Montana, 2004; :353-358
See Also
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Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines
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Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Pillar and Roof Span Design Guidelines for Underground Stone Mines
Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
Technology News 482 - Ground Support Safety Training Video
Tests of Fibre-Reinforced Shotcrete at the Chief Joseph Mine, Butte, Montana
Updating the NIOSH Support Technology Optimization Program (STOP) With New Support Technologies and Additional Design Features
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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