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- Mining types and methods:
- Room and pillar mining
- Document types:
- Contract reports
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Results 1 - 3 of 3
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3/1/1981 - Contract reportsThis report describes the design and implementation of UHF radio and closed-circuit television systems in the Black River room and pillar limestone mine near Butler, Pendleton County, Kentucky.
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1/1/1979 - Contract reportsThis report presents a mathematical model for the propagation of UHF radio waves in the large cross section tunnels of a room-and-pillar limestone mine and describes the analysis of a small amount of propagation data obtained. The model and analysis is ...
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9/1/1974 - Contract reportsTwo different techniques were used to make measurements of the absolute value of electromagnetic noise in and above an operating coal mine, McElroy Mine, located near Moundsville, West Virginia. The electromagnetic environment created by 300-volt dc and...
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Content source: National Institute for Occupational Safety and Health, Mining Program