Results 121 - 130 of 150

• Mine Safety Education and Training Seminar: Proceedings: Bureau of Mines Technology Transfer Seminar
  1/1/1988 - Conference proceedings, Information Circulars
  This proceedings volume presents several new developments that are helping to improve the quality and efficiency of health, safety, and occupational skills training in the mining community. Several papers address the issue of how to teach and assess min...
• Human Factors in Mining
  1/1/1988 - Information Circulars
  Information Circular describing various human factors within mining, including system design, capabilities and limitations, errors and accidents, and environmental factors. Bureau of Mines publication.
• A Review of the Mechanisms of Gas Outbursts in Coal
  1/1/1987 - Information Circulars
  Outbursts are sudden and violent releases of gas and coal that result from a complex function of geology, stress regime, and gas pressure and content. The Bureau of Mines has reviewed methods for prediction and mitigation of such outbursts in use worldw...
• Test Apparatus for Measuring Sound Power Levels of Drills
  1/1/1987 - Information Circulars
  This Bureau of Mines report describes in detail the design and operation of a test apparatus for measuring the sound power levels of drills used by the mining industry.
• Coal Mine Bumps: Five Case Studies in the Eastern United States
  1/1/1987 - Information Circulars
  Information was collected at 5 bump-prone mines. Among the findings, two geologic conditions have been found to cause bumps in the eastern U.S.: relatively thick overburden and extremely rigid strata immediately above and below the mine coalbed.
• Evaluating Ventilation Parameters of Three Coal Mine Gobs
  1/1/1986 - Information Circulars
  The Bureau of Mines used sulfur hexafluoride (sf6) tracer gas to evaluate the effectiveness of gob ventilation and/or sealing practices at three coal mines, each having different problems associated with their mined-out areas.
• Short-Delay Blasting in Underground Coal Mines
  1/1/1986 - Information Circulars
  Research was conducted to determine whether the total elapsed delay time for blasting bituminous coal in underground coal mines could be safely expanded beyond the 500-ms limitation without igniting a methane or methane-coal dust atmosphere.
• Results of Direct-Method Determination of the Gas Content of U.S. Coalbeds
  1/1/1986 - Information Circulars
  This report presents a data base of gas content data. The data are presented in tabular form, by coalbed name and state. The components of the total gas content (lost, desorbed, and residual gas) are given. Location (state and county), sample depth, coa...
• Impact of Background Sources on Dust Exposure of Bag Machine Operator
  1/1/1986 - Information Circulars
  The Bureau of Mines has recorded a number of different background dust sources that significantly contaminate the air breathed by bag machine operators. To keep bag operator exposure within acceptable dust levels established by the Mine Safety and Healt...
• Evaluation of Safety Shutoff Valve System on Methane Gas Pipelines Under Mine Fire Conditions
  1/1/1986 - Information Circulars
  The goal of this research was to evaluate the integrity of existing shutoff valves and actuators used under high-temperature conditions in the Bureau of Mines' horizontal borehole methane drainage pipeline system and to determine system improvements.