Results 191 - 200 of 200

• Underground Mine Communications (in Four Parts): 4. Section-to-Place Communications
  1/1/1977 - Information Circulars
  This Bureau of Mines report on underground mine communications addresses methods and equipment to meet the communication requirements of working sections and places of coal and metal-nonmetal mines. A review of the status of trapped miner detection is a...
• Underground Mine Communications (in Four Parts): 2. Paging Systems
  1/1/1977 - Information Circulars
  This Bureau of Mines report summarizes the research, development, and evaluation demonstrations conducted by the Bureau of Mines under the Coal Mine Health and Safety Act of 1969 to improve the means of notifying miners underground, who are away from th...
• Electromagnetic Noise in Lucky Friday Mine
  9/1/1974 - Contract reports
  Measurements 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...
• Research on the Transmission of Electromagnetic Signals Between Mine Workings and the Surface
  1/10/1974 - Contract reports
  Field 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...
• Peak Methane Concentrations During Coal Mining: An Analysis
  1/1/1974 - Reports of Investigations
  Methane concentration peaks were measured at coal mine working faces during entry development. The statistical distribution of peaks was found to be normal or log normal depending on how well the methane was being mixed into the ventilation airstream.
• AQE - Air Quantity Estimator
  12/8/2022 - PC software
  Use the Air Quantity Estimator to gauge the air quantity needed to dilute diesel particulate matter (DPM) in an underground large-opening mine. Now in 2.0!
• Technology News 514 - The Air Quantity Estimator (AQE): A New Computer Software Tool for Large-opening Mine Ventilation Planning
  3/1/2006 - Technology News
  A combination of engineering, administrative, and ventilation controls will eventually be required in many large opening mines in the United States to meet the regulatory DPM concentration limits. The AQE is a tool for mine planners to use to estimate s...
• Technology News 441 - SPONCOM - An Expert System to Predict Spontaneous Combustion Potential of a Coal Mining Operation
  10/1/1994 - Technology News
  An expert system computer program is described that can predict the spontaneous combustion potential of a mining operation.
• Protection Against Lightning At Surface And Underground Mining Plants
  4/1/1948 - Information Circulars
  The necessity for protection against the hazards of lightning manifests itself from time to time in the mining industry by reason of loss of life, damage to electrical equipment, fires in surface structures at mines, and accidents in the handling and us...
• A Primer on Explosives for Coal Miners
  1/1/1911 - NIOSH/USBM numbered publications
  An archived publication from the early days of the U.S. Bureau of Mines. This little book on explosives is published in the hope that it may aid in preventing accidents resulting from the improper use of explosives in mining.