Results 61 - 70 of 149

• Evaluation of Person-Wearable Methane Monitors
  1/1/2005 - Conference papers
  This paper describes test procedures used to evaluate performance of methane monitors that could be used underground for continuous personal monitoring of methane. The information in this report provides data that allow the reader to make side-by side c...
• NIOSH Research in Coal Dust and Explosions
  10/1/2004 - Conference papers
  The NIOSH mining research program at the Pittsburgh Research Laboratory (PRL) includes the areas of coal mine dust control and monitoring, and explosion prevention.
• Use of a Test Box to Measure Response Times for Machine-Mounted Monitors
  5/1/2004 - Conference papers
  This study describes how response times of machine-mounted methane monitors were measured by placing the methane sensor heads in a specially designed box where they were exposed to an atmosphere containing a constant concentration of methane.
• Lightning Propagation Through the Earth and its Potential for Methane Ignitions in Abandoned Areas of Underground Coal Mines
  10/1/2002 - Conference papers
  This paper addresses the question, 'Can lightning cause potential differences capable of igniting methane-and-air mixtures at overburden depths at which underground coal mining occurs?'
• Evaluating Performance Characteristics of Machine-Mounted Methane Monitors by Measuring Response Time
  6/1/2002 - Conference papers
  This publication examines a procedure for measuring the response time of machine-mounted methane monitors
• Factors Affecting the Location of Methanometers on Mining Equipment
  6/1/2001 - Conference papers
  This publication develops criteria for selecting the best machine locations for monitoring methane and gives recommendations for revising methane action levels for alternative sampling locations.
• Effects of Water Sprays and Scrubber Exhaust on Face Methane Concentrations
  6/1/2001 - Conference papers
  Research to determine how machine-mounted water sprays and a scrubber interact to reduce methane levels and what spray configurations provide the best face ventilation when used with a scrubber.
• Effects of Water Sprays Used With a Machine-Mounted Scrubber on Face Methane Concentrations
  2/1/2001 - Conference papers
  Past studies with blowing face ventilation systems have shown that using a machine-mounted scrubber and water sprays can reduced methane levels at the face.
• Evaluation of New Methods and Facilities to Test Explosion-Resistant Seals
  1/1/2001 - Conference papers
  This paper provides a brief overview of the ongoing study to evaluate the use of these chambers for pressure loading of full-scale seal designs using compressed air, water, or internal gas explosions.
• Research by NIOSH for Controlling Respirable Dust and Methane Gas on Continuous Miner Faces
  1/1/2001 - Conference papers
  The importance of controlling respirable dust and methane gas levels in underground coal mining cannot be underestimated. While respirable dust can significantly affect the occupational health of underground coal miner, methane gas accumulations pose s...