Electromagnetic propagation in low coal mines at medium frequencies

Cory, Terry S.

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Electromagnetic propagation in low coal mines at medium frequencies

12 June 1978
By Cory, Terry S.
Series: Mining Publications

[PDF-2.47 MB]

English

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Details:

Personal Author:

Cory, Terry S.
Corporate Authors:

United States. Bureau of Mines. ; Rockwell International. Collins Communications Switching Systems Division. ; United States. Bureau of Mines. Office of the Assistant Director--Mining.

United States. Bureau of Mines. ; Rockwell International. Collins Communications Switching Systems Division. ; United States. Bureau of Mines. Office of the Assistant Director--Mining. Less -
Description:

"This report covers magnetic field strength measurements versus range and frequency in low to medium coal mines. Both quasi-conductor- free and conductor-proximity areas were investigated. The program covered five mines, four seams, six measurement sets, and three geographic areas. The results are summarized in terms of maximum communication range expected per seam and noise condition. Scatter gain is further explored as a simple measure of energy coupled to conductors." - NIOSHTIC-2

NIOSHTIC no. 10002377
Subjects:

[+]

Magnetic Fields -- Measurement. Mine Communication Systems.
Series:

Mining Publications
Subseries:

Open File Report
Document Type:

Report
Funding:

Bureau of Mines contract H0377053
Pages in Document:

94 numbered pages
NIOSHTIC Number:

10002377
Resource Number:

OFR-63-82; Contract-H0377053
Collection(s):

National Institute for Occupational Safety and Health
Main Document Checksum:

[+]

urn:sha-512:d41d1302b2b4a26ba98c8c586620dc92f31a883dc50e9357f379f59791cc377897a5736de653a61ac12ed251cfcdd28abb470d4b139eb28edf0e9817c0a5ebd0
Download URL:

https://stacks.cdc.gov/view/cdc/8891/cdc_8891_DS1.pdf
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Electromagnetic propagation in low coal mines at medium frequencies

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