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- Equipment, tools, and parts:
- Through-the-earth communications systems
- Document types:
- Contract reports
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Results 1 - 8 of 8
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2/1/1984 - Contract reportsAn electromagnetic (EM) system for the location of trapped mine workers at coal-mine (300 m) depths has been developed.
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12/1/1983 - Contract reports, Open File ReportsA new postdisaster communication and location system using through-the-earth electromagnetic wave propagation was tested at the Bureau of Mines Lake Lynn Experimental Mine. This describes the testing process and findings.
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9/1/1982 - Contract reportsA survey of the literature on extremely low-frequency and very low- frequency atmospheric noise was made.
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12/1/1980 - Contract reports, Open File ReportsThe objective of this program was to design and build a self-contained system for remote monitoring of the atmosphere in mines. The system developed uses the mine pager phone line as the primary communication channel and also has the capability of using...
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1/15/1979 - Contract reportsCharacteristics of metal-nonmetal mines were evaluated to determine the suitability of applying the Bureau of Mines electromagnetic (em) location system to locating trapped miners.
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11/1/1974 - Contract reportsEight coal mines were visited to determine their communications usage and requirements. Available equipment was surveyed and evaluated to determine its applicability to the needs of the mines. Volume 3 contains all information used in predicting the per...
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5/1/1973 - Contract reportsThe results of a two-year research effort aimed at improving communication systems in coal mines is reported, as well as a review of communication methods presently used in coal mines. Theoretical and-experimental results of a four pronged effort in the...
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3/1/1972 - Contract reports, Open File ReportsThis report comprises three working memoranda that present preliminary performance estimates for baseband voice and narrowband through-the-earth electromagnetic communications systems of principal interest to the Bureau of Mines for operational/emergenc...
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Content source: National Institute for Occupational Safety and Health, Mining Program