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Ground penetrating radar for highwall guidance.

Authors
Mowrey-GL
Source
Holmes Saf Assn Bull 1998 Oct; :6-7
NIOSHTIC No.
20023784
Abstract
U.S. highwall operators have been seeking a method to maintain an optimum coal rib thickness throughout the entire depth of the entry, particularly in mines where the depth of penetration can be up to 400 m. In Appalachian coal mines, the typical coal rib thickness is 1 to 2 m, depending on the mechanical properties of the particular coal seam being mined. If the rib becomes too thin, the hazard of ground fall increases and with it the resulting risk of burying the mining equipment. Freeing a buried machine is an expensive process, places workers at risk, and produces no coal. Conversely, if the rib becomes too thick, the excess coal left behind is permanently unrecoverable and makes the rib thin for the next hold. Although the current typical alignment procedures utilize precision surveys, geological and mechanical forces during mining produce uncertainties in position nearly as large as the rib thickness itself at depths of 300 to 400 m despite the accuracy of the initial alignment.
Keywords
Coal-mining; Underground-mining; Mining-industry; Mining-equipment; Geology; Ground-stability; Ground-control
Contact
National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
19981001
Document Type
Journal Article
Email Address
gdm6@cdc.gov
Fiscal Year
1999
NTIS Accession No.
NTIS Price
ISSN
0271-3888
NIOSH Division
PRL
Priority Area
Emerging Technologies; Work Environment and Workforce;
Source Name
Holmes Safety Association Bulletin
State
PA;
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