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Technology News 476 - instrumented king wire for monitoring cable bolts.

Authors
NIOSH
Source
NIOSH 1998 Nov; :1-2
NIOSHTIC No.
20000645
Abstract
A cable bolt can be a strain-measuring device as well as a supporting device in underground mines. Placing instruments on a cable bolt allows certain characteristics of a rock mass, such as high strain and load, to be evaluated during mining and provides a means for mining engineers and mine inspectors to forecast a potential roof fall. Thousands of cable bolts are installed in U.S. mines each year. Studies performed by NIOSH researches show that support loads can exceed the yield point of the steel, which can result in unstable ground conditions that pose direct safety hazards for underground workers. Rock falls can also create secondary hazards, such as carved escape ways and blocked ventilation passages. Development of methods and tools to assist in the evaluation and selection of rock supports could reduce the number of unplanned rock falls significantly.
Keywords
Cables; Mining-safety; Ground-movement-detection; Roof-fall; Rock-supports; Rock-mass-movement
Publication Date
19981101
Document Type
Technology News
Fiscal Year
1999
NTIS Accession No.
NTIS Price
Identifying No.
TN-476
NIOSH Division
SRL
Source Name
National Institute for Occupational Safety and Health
State
WA
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