Cart (Loading....) | Create Account
Close category search window
 

Radio Transmission to and from Underground Coal Mines--Theory and Measurement

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Large, D. ; Conservation Foundation, Washington, D.C., USA ; Ball, L. ; Farstad, A.

Research involved in the development of a radio communication system for use in coal mine disasters is described. Theoretically predicted field strengths for surface to mine and mine to surface propagation are compared with measurements in coal mines in Colorado and Pennsylvania. It is concluded that surface-to-mine voice communication is practical using a horizontal wire antenna operating at audio frequencies, and that mine-to-surface interrupted CW signaling is practical using multiple-turn horizontal loop antennas. This research has resulted in an emergency through-the-earth communication system that is being evaluated by the U.S. Bureau of Mines for use in mine rescue operations.

Published in:

Communications, IEEE Transactions on  (Volume:21 ,  Issue: 3 )

Date of Publication:

Mar 1973

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.