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

Published Date:

12 June 1978

Series:

Open file report (United States. Bureau of Mines) ; 63-82

Language:

English

[PDF-2.47 MB]

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. ;

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

Subject:

[+]

Document Type:

Report

Funding:

Bureau of Mines contract H0377053

Collection(s):

National Institute for Occupational Safety and Health

Main Document Checksum:

[+]

Supporting Files:

No Additional Files

No Related Documents.

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