Results 31 - 40 of 40

• Measurement of Airflow in a Simulated Underground Mine Environment Using an Ultrasonic Anemometer
  1/1/2004 - Peer reviewed journal articles
  Reports on a test system and computer program developed for using a three-axis ultrasonic anemometer to measure airflow in a simulated mine entry.
• Technology News 499 - Using Propeller Fans to Improve Ventilation in Large-Entry Stone Mines
  12/1/2002 - Technology News
  This Tech News reports on how the use of propeller fans can significantly improve the ventilation in large entry stone mines due to their efficiency at lower pressures and less required horsepower.
• Laboratory Testing To Quantify Dust Entrainment During Shield Advance
  6/1/2001 - Conference papers
  A series of controlled laboratory tests were conducted in a test stand simulating shield dust entrainment to evaluate changes in airborne respirable dust levels at different air velocities.
• Technology News 485 - Improved Cab Air Inlet Location Reduces Dust Levels and Air Filter Loading Rates
  2/1/2001 - Technology News
  Higher efficiency air filters provide good dust control for the equipment operator, but tend to accumulate dust more quickly than lower efficiency air filters.
• Laboratory Evaluation of Shield Dust Entrainment in High-Velocity Airstreams
  2/1/2001 - Conference papers
  Laboratory test to simulate dust liberation during shield movement were conducted.
• In-depth Survey Report: Control Technology for Environmental Enclosures - The Effect of Wind Speed Upon Aerosol Penetration Into an Enclosure at Clean Air Filter, Defiance, IA
  2/1/1999 - NIOSH/USBM numbered publications
  The effect of wind speed upon aerosol penetration into an idealized enclosure was studied.
• Reverse Performance Characteristics of Main Mine Fans
  8/1/1983 - Open File Reports
  Laboratory and field tests of vane axial main mine fans in the 7- to 9-ft diameter size range were conducted to establish forward and reverse performance characteristics under controlled conditions and at typical mine installations.
• Sulfur Hexafluoride as a Mine Ventilation Research Tool - Recent Field Applications
  12/1/1982 - Reports of Investigations
  Sulfur hexafluoride (SF6) is an odorless, colorless, nontoxic gas that has found acceptance as a tracer gas in research on ventilation patterns, measurement of air leak rates, respirable dust reductions due to bagging hood modifications, and the study o...
• Tracer Gas as an Aid in Mine Ventilation Analysis
  1/1/1974 - Reports of Investigations
  The Bureau of Mines has successfully used sulfur hexafluoride (SF6) as a tracer gas to measure mine air flows under conditions where conventional methods have failed. SF6 was employed experimentally to measure accurately recirculation of return into int...
• Introduction to Mine Ventilating Principles and Practices
  1/1/1960 - NIOSH/USBM numbered publications
  This bulletin is written to explain in layman language the basic laws and fundamentals of mine airflow and their application to the solution of common ventilating problems. The attempt is to reduce the complex and difficult ventilating formulas to simpl...