Results 121 - 130 of 646

• Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
  11/1/2009 - Conference papers
  This paper demonstrates the applications of coal bed reservoir engineering and modeling techniques for optimizing and controlling methane emissions in longwall and continuous miner sections.
• Controlling and Monitoring Diesel Emissions in Underground Mines in the United States
  11/1/2009 - Conference papers
  The Pittsburgh Research Laboratory (PRL) of NIOSH conducts research to evaluate control technologies and monitoring instrumentation that can be used to reduce the diesel particulate matter (DPM) exposure of mine workers.
• Real-Time DPM Ambient Monitoring in Underground Mines
  11/1/2009 - Conference papers
  The paper discusses how the Diesel Particulate Matter (DPM) monitors have performed within the underground mine environment in evaluating DPM during the various phases of longwall moves.
• Development of Roof-Bolting Machine Bit and Chuck Isolators for Drilling Noise Reductions
  11/1/2009 - Conference papers
  NIOSH is developing bit and chuck isolators to reduce vibration, and thus noise radiation of the drill steel, with the longer-term goal of reducing roof bolting machine operator noise exposure.
• A Comparison of Beamforming Processing Techniques for Low Frequency Noise Source Identification in Mining Equipment
  11/1/2009 - Conference papers
  This paper describes NIOSH research to develop noise controls for mining equipment whose operators exceed the Permissible Exposure Level (PEL). Two alternative approaches are explored to the conventional beamforming algorithm.
• An Overview of Fundamental and Emerging Technologies to Monitor and Control Respirable Dust in Underground Coal Mines in the United States
  11/1/2009 - Conference papers
  This paper discusses a limited number of control technologies to reduce or eliminate harmful respirable dust.
• Numerical Study on Spontaneous Combustion of Coal in U.S. Longwall Gob Areas
  11/1/2009 - Conference papers
  In this paper, computational fluid dynamics (CFD) modeling results for both bleeder and bleederless ventilation systems are presented and the difference between two systems is discussed.
• Structural Vibration as a Noise Source on Vibrating Screens
  11/1/2009 - Conference papers
  For horizontal vibrating screens, NIOSH testing indicates that the screen sides and feed box are dominant noise sources for the 250 Hz through 800 Hz one-third octave bands, while the electric motor is the most significant source for the 1 kHz band.
• Evaluation of Work Positions used by Continuous Miner Operators in Underground Coal Mines
  10/1/2009 - Conference papers
  By surveying experienced equipment operators about visual cues, researchers developed a method to gather data on the needs and practices of machine operators while controlling the machine and the reasons for needing particular operational cues.
• Cementitious Plug Seal/Rock Interface Under Static and Dynamic Loadings
  10/1/2009 - Conference papers
  The objective of this research is to estimate the cementitious seal/rock interface properties from full scale test results.