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Using the coal mine roof rating (CMRR) to assess roof stability in U.S. coal mines.

Authors
Molinda-GM; Mark-C; Debasis-D
Source
J Mines Met Fuels 2001 Aug-Sep; :314-321
Link
NIOSHTIC No.
20021814
Abstract
The stability of any underground opening is, in large part, a function of the strength of the rock mass which surrounds it. The Coal Mine Roof Rating (CMRR) has been developed to quantify the defects in the rock mass and compile a strength value which can be used for engineering design. The CMRR has been applied to a number of ground stability problems, including chain pillar design, roof bolt selection, hazard assessment, intersection design, and numerical modeling. The CMRR procedure and some of these applications are described in this paper. The CMRR will soon be available in a Visual Basic computer program, allowing easy integration into exploration programs and standard roof fall assessments.
Keywords
Mining-industry; Underground-mining; Ground-stability; Ground-control; Rock-mechanics; Geology; Computer-models; Computer-software
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
CODEN
JMMFAM
Publication Date
20010801
Document Type
Journal Article
Fiscal Year
2001
NTIS Accession No.
NTIS Price
ISSN
0022-2755
NIOSH Division
PRL
Source Name
J Mines Metals Fuels
State
PA
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