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- Mining types and methods:
- Underground mining
- Document types:
- Contract reports
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Results 1 - 8 of 8
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9/1/1983 - Contract reportsThe use of electromagnetic field producing equipment in underground coal mining operations can only be expected to grow. The use of these equipment in underground mining operations is hampered by the possibility of their electromagnetic fields interacti...
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5/1/1983 - Contract reportsThis report describes a project in which Development of a Supervisory and Management Training Program for the Underground Coal mining Industry was developed and evaluated.
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2/1/1982 - Contract reportsAn evaluation was made of one of several improved underground communication systems sponsored by the U.S. Bureau of Mines. The system was installed in a typical metal-nonmetal, room-and-pillar mine and utilized ultrahigh frequency repeaters connected to...
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2/1/1982 - Contract reportsThe objective of this project was to perform a preliminary study to determine the desirability/practicality of burying the communication cables in underground mines in order to protect then from the effects of fires and explosions. We found the overall ...
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4/1/1981 - Contract reportsThis report presents test results, data evaluations, and typical system performance expectations based on wireless electromagnetic propagation measurements performed in the MAGMA Copper Company San Manuel mine near Tucson, Arizona during March 30 throug...
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1/1/1981 - Contract reportsThis report describes the results of a measurement and analysis program to characterize wireless radio transmission in metal-nonmetal mines over a wide frequency range from 0.2 to 1,000 mhz and over a variety of mine environments.
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9/1/1974 - Contract reportsMeasurements of the absolute value of electromagnetic noise and attenuation along a hoist rope were made in an operating Hard-Rock Mine, Lucky Friday Mine, located near Wallace, Idaho. The specific measured results are given in a number of spectral plot...
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1/10/1974 - Contract reportsField studies 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) s...
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Content source: National Institute for Occupational Safety and Health, Mining Program