Results 31 - 40 of 45

• Use of a Directional Spray System Design to Control Respirable Dust and Face Gas Concentrations Around a Continuous Mining Machine
  12/1/2004 - Peer reviewed journal articles
  A laboratory study assessed the impacts of water spray pressure, face ventilation quantity, and line brattice setback distance on respirable dust and SF6 tracer gas concentrations around a continuous mining machine using a sprayfan or directional spray ...
• Using Proximate Analysis to Characterize Airborne Dust Generation from Bituminous Coals
  6/1/2002 - Peer reviewed journal articles
  The amount of airborne respirable dust generated from breakage of different coals varies widely. This research was conducted to identify the facets of airborne respirable dust liberation from the coal product.
• Impact of Control Parameters on Shearer-Generated Dust Levels
  1/1/2002 - Peer reviewed journal articles
  Full-scale laboratory tests provide information to longwall operators that would assist them in selecting control parameters to reduce dust levels for mine-specific conditions.
• 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.
• 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.
• New Tools To Monitor Personal Exposure To Respirable Coal Mine Dust
  1/1/2001 - Conference papers
  The compliance sampling method for coal mine dust in the United States has not changed appreciably in the last 30 years. A call for more frequent sampling with immediately available results is leading to new instruments that may supplement or replace th...
• Laboratory Evaluation of Pressure Differential-based Respirable Dust Detector Tube
  1/1/2000 - Peer reviewed journal articles
  Assessment of exposure to occupational dusts is a first step in reducing exposures to harmful dust concentrations. A new type of respirable dust sampler was developed and compared side-by-side to personal gravimetric samplers in the laboratory.
• Investigation of Coal Properties and Airborne Respirable Dust Generation
  10/1/1998 - Reports of Investigations
  Laboratory testing and results are presented where five bituminous coals were prepared and processed through a double roll crusher located in a low-velocity wind tunnel. The results indicate that a combination of several factors are associated with air...
• Status of a Tapered Element, Oscillation Microbalance-Based Continuous Respirable Coal Mine Dust Monitor
  1/1/1996 - Peer reviewed journal articles
  In response to the Mine Safety and Health Administration's request, the U.S. Bureau of Mines investigated several sensor technologies for continuously monitoring respirable coal mine dust. One of these technologies is the tapered element, oscillating m...
• Dust Considerations When Using Belt Entry Air to Ventilate Work Areas
  1/1/1992 - Reports of Investigations
  Dust surveys were conducted to determine factors affecting belt entry dust levels and how using belt air to ventilate work areas affected dust exposures.