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Coal Mine Rescue and Survival - 3 Volume Set. Volume 2 - Communications/location Subsystem.

Authors
Anonymous
Source
NTIS: PB/208-267 Available for Reference At Bureau Libraries :258 pages
Link
NIOSHTIC No.
10001463
Abstract
This volume covers electromagnetic and seismic equipment for locating and communicating with workers trapped underground either behind barricades, in refuge chambers, or attempting to escape. The electromagnetic (em) voice downlink and coded beacon uplink were tested and qualitatively and quantitatively evaluated at five different coal mines. In the voice downlink test, intelligible voice transmission was received using a horizontal wire transmitting antenna terminated in the ground at each end. Coded beacon transmissions were also detectable on the surface. Studies indicate that the em system could be effectively used in rescue operation in most coal mines, provided that the mines were equipped with subsurface em transmitters and receivers. Further testing, however, was recommended including operation of the communications/location subsystem in a continuing training program.
Publication Date
19710101
Document Type
CP; Final Contract Report;
Fiscal Year
1971
NTIS Accession No.
PB-208267
NTIS Price
A13
Identifying No.
OFR 9(2)-72
NIOSH Division
PRC;
Source Name
NTIS: PB/208-267; Available for Reference At Bureau Libraries
Performing Organization
Westinghouse Research
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