Results 1 - 10 of 103

• Composition Change Model for Sealed Atmosphere in Coal Mines
  6/1/2010 - Conference papers
  This paper presents a mathematical model based on the conservation of mass principle describing the flow of air (nitrogen and oxygen), methane, and carbon dioxide into and out of a sealed atmosphere and time-dependent changes in gas concentration.
• Modeling the Effect of Seal Leakage on Spontaneous Heating in a Longwall Gob Area
  6/1/2010 - Conference papers
  In this NIOSH study, a computational fluid dynamics (CFD) model developed in previous work is used to model the effect of seal leakage on spontaneous heating of coal in longwall gob behind the seal.
• Improvements in Conveyor Belt Fire Suppression Systems for U.S. Coal Mines
  3/1/2010 - Conference papers
  NIOSH conducted full-scale fire suppression experiments, and this report discusses the large-scale experimental configuration, installation of the fire suppression system, and conclusions regarding the effect of air velocity and other factors.
• Continuous Miner Spray Considerations for Optimizing Scrubber Performance in Exhaust Ventilation Systems
  2/1/2010 - Conference papers
  This paper describes lab experiments to examine the effect of spray type, pressure, machine body blocking sprays, and scrubber airflow on dust and gas levels while using a 12.2 m (40 ft) exhaust ventilation curtain setback from the face.
• Explosion Pressure Design Criteria for Seals in U.S. Coal Mine - An Update on Work at NIOSH
  11/1/2009 - Conference papers
  This paper seeks to encourage scientific discussion among international peers since preventing explosions within sealed areas is of interest to underground coal operators and regulators.
• Design and Analysis of a New Method to Test Mine Seals
  10/1/2009 - Conference papers
  This report describes a new seal testing program that will provide essential validation data for mine seal analysis and design methods.
• Compendium of Structural Testing Data for 20-psi Coal Mine Seals
  8/1/2009 - Information Circulars
  This report presents nearly all structural data available from explosion tests of 20-psi mine ventilation seals and concrete-block ventilation stoppings that were conducted by the NIOSH during 1997-2008.
• Use of Pressure Swing Adsorption Technology to Inert Sealed Mine Areas with Nitrogen
  2/1/2009 - Conference papers
  This paper describes the effort to create a reliable in-mine mobile plant for extracting nitrogen gas from the mine atmosphere. The gas produced by this novel technology can be used to create an inert environment in sealed mine areas.
• Explosion Pressure Design Criteria for New Seals in U.S. Coal Mines
  7/1/2007 - Guides and manuals, Information Circulars
  This report provides a sound scientific and engineering justification to recommend a three-tiered explosion pressure design criterion for new seals. The recommendations contained herein apply to new seal design and construction in U.S. coal mines.
• Maintenance Free Impingement Screen In-Mine Testing
  6/15/2023 - Contracts and cooperative agreements
  A contract to test a maintenance-free flooded-bed scrubber screen for acceptable use in underground coal mining applications.