Results 281 - 290 of 646

• Measuring Diesel Particulate Matter in Underground Mines Using Submicron Elemental Carbon as a Surrogate
  6/1/2006 - Conference papers
  Elemental carbon (EC) is used as a surrogate for regulating the exposure to diesel particulate matter (DPM) of underground metal/nonmetal miners. Currently, EC represents DPM well in underground mines. Some control technologies have been shown to possib...
• Effect of Scrubber Operation on Airflow and Methane Patterns at the Mining Face
  6/1/2006 - Conference papers
  Tests were conducted in a full-scale ventilation gallery with a model mining machine that simulated airflow created by a dust scrubber. The results showed that operation of machine-mounted scrubbers improved face ventilation when blowing ventilation is ...
• Development of Ground Response Curves for Longwall Tailgate Support Design
  6/1/2006 - Conference papers
  This paper presents the results of a study into the ground response around tailgate entries using numerical models. The potential exists to develop site-specific tailgate design curves by combining model results with field observations.
• Explosion Evaluation of Mine Ventilation Stoppings
  6/1/2006 - Conference papers
  NIOSH and MSHA conducted joint research to evaluate explosion blast effects on mine ventilation stoppings at NIOSH Lake Lynn Experimental Mine. Results will aid in determining explosion forces that damage stoppings during actual coal mine explosions.
• Evaluation of Remotely Installed Mine Seals for Mine Fire Control
  6/1/2006 - Conference papers
  NIOSH is conducting full-scale underground experiments at its Lake Lynn Experimental Mine to identify and remedy existing shortcomings of remote sealing technology in order to develop new and improved technologies for the mining industry.
• Computational Fluid Dynamics Study on the Ventilation Flow Paths In Longwall Gobs
  6/1/2006 - Conference papers
  This paper focuses on the flow patterns within the gob under three different ventilation systems: one-entry and two-entry bleederless systems, as well as a three-entry bleeder system.
• Maximizing the Ventilation of Large-Opening Mines
  6/1/2006 - Conference papers
  NIOSH research suggest that by incorporating ventilation planning into the mine planning process, using propeller fans, developing new stopping materials and construction methods, and using long pillars to eliminate crosscuts where possible, the ventila...
• Dust Control on Longwalls: Assessment of the State of the Art
  6/1/2006 - Conference papers
  This paper presents an update on longwall dust control technology and practices in the U.S. It summarizes the results of NIOSH dust surveys conducted at longwalls throughout the country to document the types of controls that are being used and to quanti...
• Impact of Fan Type for Reducing Respirable Dust at an Underground Limestone Crushing Facility
  6/1/2006 - Conference papers
  NIOSH researchers have demonstrated that mine-wide ventilation in large-opening stone mines can be improved by using low-pressure, high-volume propeller fans and constructing stoppings in key locations to direct and control airflow.
• Fan Selection For Large-Opening Mines: Vane-Axial Or Propeller Fans - Which To Choose?
  6/1/2006 - Conference papers
  The flow characteristics of both vane-axial and propeller fans were investigated and tested at four large-opening mines to assess the effects of fan location on recirculation and entrainment.