Electromagnetic propagation in low coal mines at medium frequencies

Cory, Terry S.

Back to Previous Page

- Add this to...
- Twitter
- Facebook
- Google Bookmarks
- LinkedIn

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 Authors:

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.

Keywords:

[+]

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

Document Type:

Report

Collection(s):

National Institute for Occupational Safety and Health

Funding:

Bureau of Mines contract H0377053

Supporting Files:

No Additional Files

No Related Documents.

You May Also Like:

Through-the-earth electromagnetic trapped miner location systems : a review

Personal Author:

Pittman, Walter E., Jr.; Church, Ronald H.; McLendon, J. T.;

Corporate Author:

Tuscaloosa Research Center (United States. Bureau of Mines)

Published:

1985

Series:

Open file report (United States. Bureau of Mines) ; 1985-127

Description:

"In its role of providing technical assistance to the mining industry, the Bureau of Mines' Tuscaloosa Research Center has conducted research to develop trapped miner location systems which would aid in locating miners trapped by underground mining d...

File Type:

[PDF - 2.64 MB]
Medium-Frequency Propagation In Coal Mines

Personal Author:

Sacks, H. Kenneth; Chufo, Robert L.;

Published:

0/1/1900

Description:

Medium-frequency (MF) waves can propagate in a coal seam, bounded above and below by conducting rock, in an approximate transverse electro-magnetic (TEM) transmission-line mode with the electric field vertical and the magnetic field horizontal. The t...

File Type:

[PDF - 402.32 KB]
Modelling and data analysis of 50 to 5000 kHz radio wave propagation in coal mines : supplement to final report

Personal Author:

Lagace, Robert L.; Emslie, Alfred G.; Grossman, Michael A.;

Corporate Author:

Arthur D. Little, Inc.. United States. Bureau of Mines..

Published:

February 1980

Series:

Open-file report (United States. Bureau of Mines) ; 1980-83

File Type:

[PDF - 9.67 MB]
Interaction of radio transmissions on mine monitoring and control systems

Personal Author:

Stolarczyk, Larry G.

Corporate Author:

United States. Bureau of Mines.. A.R.F. Products, Inc..

Published:

May 1986

Series:

Mining research contract report.
Open file report (United States. Bureau of Mines) ; 7-87

Description:

"This report describes the creation of an efficient method to determine if command, control, communication, and monitoring (3cm) equipment in coal, metal, and nonmetal mines is susceptible to radio frequency interference (RFI) from the medium-frequen...

File Type:

[PDF - 1.99 MB]
Summary report of electromagnetic location techniques working group

Personal Author:

Farstad, Arnold J.

Conference Author:

Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)

Published:

1973

Source:

Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 171-177

Series:

Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines

Description:

The Location Group conversed in the Petroleum Room of the Green Center with the purpose of addressing the following list of topics in light of the Bureau of Mines' requirements for detecting and locating trapped miners by electromagnetic methods. The...

File Type:

[PDF - 288.74 KB]