Results 51 - 60 of 60

• Geologic Investigations of Underground Coal Mining Problems
  1/1/1975 - Reports of Investigations
  Geological surveys were completed in six coal mines to study the overall geology of the coalbed, and to use the resulting data to evaluate the influence of the geological characteristics of the coalbed on safe and efficient coal extraction.
• Proceedings of Thru-The-Earth Electromagnetics Workshop
  12/1/1973 - Conference proceedings, Contract reports
  A need arose to assemble individuals who have been active in current research on the topic of electromagnetic communications systems so that the problem of how information may be conveyed by electromagnetic waves propagating through rock media without t...
• Preliminary Performance Predictions For Electromagnetic Through-The-Earth Mine Communications: A Collection of Working Memoranda
  3/1/1972 - Contract reports, Open File Reports
  This 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...
• List of Bureau of Mines Publications and Articles, January 1, 1960 to December 31, 1964
  1/1/1966 - Catalogs and indexes, NIOSH/USBM numbered publications
  This issue of the list of Bureau of Mines publications and articles describes reports and articles published during the period January 1, 1960, to December 31, 1964.
• Removing Methane (Degasification) from the Pittsburgh Coalbed in Northern West Virginia
  1/1/1962 - Reports of Investigations
  A joint investigation by the Bureau of Mines and the Christopher Coal Co. at the Humphrey No. 7 mine, operating in the Pittsburgh coalbed in northern West Virginia, was undertaken to gain more insight concerning the hazardous emission of methane gas in ...
• First Series of Coal-Dust Explosion Tests in the Experimental Mine
  4/1/1913 - NIOSH/USBM numbered publications
  A USBM report that presents the results of the first series of coal dust tests conducted in the experimental mine, along with a description of the experimental mine and its establishment.
• Coal-Mine Ventilation Factors
  1/1/1929 - NIOSH/USBM numbered publications
  Ventilation has been a primary problem in coal mining since mines were first worked under sufficient cover to encounter inflammable or other noxious gases. This report describes testing done to determine how volumes of air be taken from the atmosphere
• Coal-Dust Explosion Tests in the Experimental Mine 1919 to 1924, Inclusive
  1/1/1927 - NIOSH/USBM numbered publications
  This report on the third series of coal-dust explosibility tests at the experimental mine near Bruceton, PA., about 12 miles from the Pittsburgh experiment station of the bureau, covers the years 1919 to 1924, inclusive.
• Approved Electric Lamps for Miners
  7/1/1917 - NIOSH/USBM numbered publications
  This bulletin describes the development of lamps that meet the requirements of the underground mining industry and discusses features and qualities, which in 1916, were being put into use by mine operators in the US at the rate of about 2400 a week.
• First National Mine-Safety Demonstration, Pittsburgh, Pa., October 30 and 31, 1911
  1/1/1912 - NIOSH/USBM numbered publications
  This bulletin is published as a further means to this end, in order that those concerned who did not attend the demonstration may have their attention attracted to the Bureau and its purpose.