Results 491 - 500 of 618

• An Inexpensive Dual-Chamber Particle Monitor: Laboratory Characterization
  6/1/2006 - Peer reviewed journal articles
  Recent advances in technology have enabled the development of a small, portable, data-logging particle monitor, modified from commercial smoke alarm technology, that can meet the needs of surveys in the developing world at reasonable cost.
• The Effects of Water Spray Placement for Controlling Respirable Dust and Face Methane Concentrations
  4/1/2006 - Peer reviewed journal articles
  A series of laboratory evaluations examined the impact of water spray pressure, curtain setback distance, and external and underboom spray use for controlling respirable dust levels and sulfur hexafluoride tracer gas concentrations around a continuous m...
• Methods to Determine the Status of Mine Atmospheres - an Overview
  4/1/2006 - Conference papers, Peer reviewed journal articles
  This paper serves as an overview to remind and/or instruct readers about gas-sampling methodologies and gas analyses to assist in determining the status of underground atmospheres.
• An Exploratory Study of Loading and Morphometric Factors Associated with Specific Failure Modes in Fatigue Testing of Lumbar Motion Segments
  3/1/2006 - Peer reviewed journal articles
  Thirty-six human lumbar motion segments were fatigue tested using spinal compressive and shear loads that simulated lifting a 9 kg weight in three torso flexion angles. Results indicated that stellate endplate fractures were associated with increased po...
• Standing Support Alternatives in Western United States Longwalls
  2/1/2006 - Peer reviewed journal articles
  This article compares the performance characteristics of various support systems, including wood cribs, can supports, cluster props and pumpable supports.
• Demonstration of Remote Mine Seal Construction
  1/1/2006 - Peer reviewed journal articles
  Mine seals can be remotely constructed in underground coal mines through vertical boreholes when direct access to a fire is impossible or considered to be too dangerous. Full-scale remote mine seal construction research is being conducted at the Nationa...
• Performance of a Light-scattering Dust Monitor in Underground Mines
  1/1/2006 - Peer reviewed journal articles
  The Thermo-MIE personal DataRAM dust monitor (pDR) is a light-scattering instrument approved for use in gassy underground mines by the U.S. Mine Safety and Health Administration (MSHA). However, the use of light-scattering monitors has been inhibited by...
• Smoke Reversal Interaction with Diagonal Airway - Its Elusive Character
  1/1/2006 - Peer reviewed journal articles
  NIOSH conducted four diesel-fuel fire experiments with specific fire heat-release rates to determine the reversal of smoke products-of-combustion from a mine fire in a mine section with the airway connectivity of an electrical Wheatstone bridge.
• Crystalline Silica Analysis: A Comparison of Calibration Materials and Recent Coal Mine Dust Size Distributions
  1/1/2006 - Peer reviewed journal articles
  Since 1982, standard calibration materials recommended for respirable crystalline silica analysis by the Mine Safety and Health Administration (MSHA) P7 Infrared Method and the NIOSH X-ray Diffraction (XRD) Analytical Method 7500 have undergone minor ch...
• Sound Power Level Study of a Roof Bolter
  1/1/2006 - Peer reviewed journal articles
  NIOSH initiated a study of a roof bolter to reduce noise exposure to mine roof bolter operators. When drilling into granite, it was found that wet drilling generated lower sound power levels and performed better than vacuum drilling.