Results 61 - 70 of 102

• Strengthening Existing 20-psi Mine Ventilation Seals With Carbon Fiber-Reinforced Polymer Reinforcement
  1/1/2008 - Reports of Investigations
  This report discusses the testing and full-scale evaluations of a recently developed carbon fiber-reinforced polymer (CFRP) reinforcement technique for upgrading existing mine ventilation seals to withstand an explosion pressure of 50 psi or greater whi...
• Remote Mine Fire Suppression Technology
  11/1/2007 - Conference papers
  This paper presents a summary of remote mine firefighting technologies used in U.S. underground coal mines and the results of completed NIOSH research in that area.
• Dust Control Practices for Underground Coal Mining
  9/1/2007 - Conference papers
  This paper summarizes existing dust control technologies routinely being used in underground coal mine operations, and provides a review of new controls that are being pursued.
• Effect of Scrubber Operation on Airflow and Methane Patterns at the Mining Face
  6/1/2006 - Conference papers
  Tests were conducted in a full-scale ventilation gallery with a model mining machine that simulated airflow created by a dust scrubber. The results showed that operation of machine-mounted scrubbers improved face ventilation when blowing ventilation is ...
• Evaluation of Remotely Installed Mine Seals for Mine Fire Control
  6/1/2006 - Conference papers
  NIOSH is conducting full-scale underground experiments at its Lake Lynn Experimental Mine to identify and remedy existing shortcomings of remote sealing technology in order to develop new and improved technologies for the mining industry.
• Maximizing the Ventilation of Large-Opening Mines
  6/1/2006 - Conference papers
  NIOSH research suggest that by incorporating ventilation planning into the mine planning process, using propeller fans, developing new stopping materials and construction methods, and using long pillars to eliminate crosscuts where possible, the ventila...
• Fan Selection For Large-Opening Mines: Vane-Axial Or Propeller Fans - Which To Choose?
  6/1/2006 - Conference papers
  The flow characteristics of both vane-axial and propeller fans were investigated and tested at four large-opening mines to assess the effects of fan location on recirculation and entrainment.
• Technology News 519 - EZ-Up Curtain Stoppings: A Practical Solution for Directing Ventilation Airflows in Large-opening Metal/Nonmetal Mines
  5/1/2006 - Technology News
  The EZ-Up curtain stopping is designed primarily for use as a temporary or portable stopping, although test results indicate that it may remain durable for an extended time. It can be constructed from a variety of fabrics, including standard mine bratti...
• Development of a Lower-Pressure Water-Powered Spot Scrubber for Mining Applications
  1/1/2006 - Peer reviewed journal articles
  NIOSH recently investigated the performance of a lower-pressure, water-powered in-line series spray scrubber for removing localized airborne dust emitted at the source. Results showed noticeable improvements in airborne dust capture efficiency through ...
• Using Ultrasonic Anemometers to Evaluate Factors Affecting Face Ventilation Effectiveness
  1/1/2006 - Peer reviewed journal articles
  A test system was developed at NIOSH's ventilation test gallery to measure airflow using a three-axis ultrasonic anemometer. The gallery was used to simulate face airflow conditions in underground mines having a blowing curtain. Airflow data were used t...