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Evaluation of instability of underground openings in rock masses of varying quality: a parametric study using the distinct element method.

Authors
Lasich-TJ; MacLaughlin-MM; Brady-TM
Source
Mining Rocks! 107th CIM-AGM, April 24-27, 2005, Toronto, Ontario, Canada. Montreal, Quebec, Canada: Canadian Institute of Mining, Metallurgy and Petroleum, 2005 Apr; :1
Link
NIOSHTIC No.
20030318
Abstract
This project involves 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 will be performed using Itasca.s UDEC distinct element software, which allows explicit modeling of blocks of rock and how they interact with each other. The analyses will include different orientations of the joint sets as well as different joint spacing and strength. Quantification of the size of the unstable area that develops may provide important information to be used in support design as well as design of instrumented monitoring systems. An example of a portion of one of the UDEC models showing the development of unstable blocks around an underground excavation is shown in the figure below.
Keywords
Ground-control; Ground-stability; Mining-industry; Miners; Mine-workers; Underground-mining; Underground-miners; Rock-mechanics; Models; Monitoring-systems
Publication Date
20050401
Document Type
Conference/Symposia Proceedings; Abstract
Fiscal Year
2005
NTIS Accession No.
NTIS Price
NIOSH Division
SRL
Source Name
Mining Rocks! 107th CIM-AGM, April 24-27, 2005, Toronto, Ontario, Canada
State
WA
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