Research on the Transmission of Electromagnetic Signals Between Mine Workings and the Surface

Research on the Transmission of Electromagnetic Signals Between Mine Workings and the Surface

by Richard G. Geyer, George V. Keller, Takashi Ohya
     
 

Field studies (Contract No. H0101691) of ambient electromagnetic noise and electrical transmission properties of coal mine overburdens in Colorado, Illinois, Pennsylvania, and West Virginia were conducted. Field tests of the transmission of low-frequency (20 hz to 20,000 hz) signals by vertical axis loops and horizontal wire antenna were made and compared with… See more details below

Overview

Field studies (Contract No. H0101691) of ambient electromagnetic noise and electrical transmission properties of coal mine overburdens in Colorado, Illinois, Pennsylvania, and West Virginia were conducted. Field tests of the transmission of low-frequency (20 hz to 20,000 hz) signals by vertical axis loops and horizontal wire antenna were made and compared with theoretical predictions. Implications of the field tests for the design of an electromagnetic system to locate trapped miners are discussed.

Product Details

ISBN-13:
2940013206557
Publisher:
1001 Property Solutions LLC
Publication date:
10/24/2011
Sold by:
Barnes & Noble
Format:
NOOK Book
File size:
12 MB
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