Results 161 - 170 of 220

• Feasibility of Using Laser-Based Vibration Measurements to Detect Roof Fall Hazards in Underground Mines
  6/1/2002 - Conference papers
  This paper looks at the feasibility of using noncontact laser-based vibration measurements to detect roof fall hazards with the ultimate vision of improving, expanding and automating procedures for mine roof inspection.
• 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
• Differential Pressure Response of 25-mm-Diameter Glass Fiber Filters Challenged with Coal and Limestone Dust Mixtures
  2/1/2002 - Peer reviewed journal articles
  This article summarized results of research conducted by the National Institute for Occupational Safety and Health (NIOSH) at its Pittsburgh Research Laboratory. The objective of this work was to determine the correlation between the mass (M) of respir...
• Use of Ground Penetrating Radar and Schmidt Hammer Tests to Determine the Structural Integrity of a Mine Seal
  2/1/2002 - Conference papers
  Over the years, more than 20,000 mine seals have been erected in underground coal mines in the United States. The National Institute for Occupational Safety and Health is conducting research to develop design guidelines, to investigate noninvasive tech...
• Chemical and Physical Factors that Influence N0x Production During Blasting: Exploratory Study
  2/1/2002 - Conference papers
  Report on a NIOSH study to identify factors that may contribute to nitrogen oxides (NOx) production associated with non-ideal detonation of blasting agents.
• Historical Perspective of Personal Dust Sampling in Coal Mines
  1/1/2002 - Conference papers
  This paper examines the development of dust sampling methods in U.S. coal mines, with emphasis on the benefits of personal sampling and on recent developments that permit real-time assessment of dust exposure.
• Technology News 490 - An Inexpensive Device for Monitoring Explosions in Sealed Areas of Underground Mines
  6/1/2001 - Technology News
  Description of a passive, inexpensive technique for monitoring explosion overpressures within sealed areas in underground coal mines.
• 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.
• Test Report on the Machine-Mounted Continuous Respirable Dust Monitor
  6/1/2001 - Conference papers
  The machine-mounted continuous respirable dust monitor (MMCRDM) is a fixed-location area sampling device developed for possible use at the working face of an underground coal mine. decades. Recently, an extensive series of laboratory and underground tes...
• The Modified Direct Method: A Solution for Obtaining Accurate Coal Desorption Measurements
  5/1/2001 - Conference papers
  This paper covers the development of NIOSH's modified direct method to measure the gas content of coal samples.