Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Evaluation of a signaling and warning system for underground mines.

Authors
Conti-RS; Yewen-RG
Source
NIOSH 1997 May; :1-21
NIOSHTIC No.
00238253
Abstract
A wireless signaling and warning system applicable to both coal and noncoal underground mines was evaluated. A TeleMagnetic Signalling Systems wireless ultra low frequency electromagnetic signaling system was installed at an experimental mine site at Lake Lynn laboratory, Pennsylvania. The system used a transmitter and antenna system which produced a low frequency electromagnetic field with a programmable carrier output frequency of about 2 to 3 kilohertz. A commercial smoke sensor was interfaced to a remote portable transmitter, and the alarm of the sensor was used to trigger the central evacuation and paging transmitter system during experimental mine fires. The underground/surface receivers flashed cap lamps and activated remote devices, such as strobe lights, within 30 to 40 seconds after the encoded signal was received. Evaluation results showed full mine coverage of the electromagnetic field and the encoded signal was received at the farthest point underground and on the surface perimeter. The cost of a signaling and warning system such as the one installed at the experimental laboratory was about 20,000 dollars.
Keywords
NIOSH-Publication; NIOSH-Cooperative-Agreement; Mining-industry; Mine-fires; Underground-mining; Warning-signals; Safety-equipment; Emergency-equipment
Contact
National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
19970501
Document Type
Numbered Publication; Final Cooperative Agreement Report
Funding Type
Cooperative Agreement
Fiscal Year
1997
NTIS Accession No.
PB97-169593
NTIS Price
A03
Identifying No.
(NIOSH) 97-127; RI-9641; BOM-CRDA-6200-0119; R
ISSN
1066-5552
NIOSH Division
PRL
Source Name
National Institute for Occupational Safety and Health
State
PA
TOP