Results 21 - 30 of 646

• Field Evaluation of Diesel Particulate Matter Using Portable Elemental Carbon Monitors
  6/1/2010 - Conference papers
  NIOSH has developed a portable elemental carbon monitoring device for use in underground mines. This paper discusses a variety of ways that this instrument has been used to help lower DPM concentrations and exposure to DPM in active mines.
• Validation of the Ventgraph Program for Use in Metal/Non-metal Mines
  6/1/2010 - Conference papers
  This study's goal was to validate the use of Ventgraph in a deep M/NM mine fire and illustrate its use as a valuable tool in mine ventilation, fire, and evacuation planning.
• The Effects of Passive Diesel Particulate Filters on Diesel Particulate Matter Concentrations in Two Underground Metal/Nonmetal Mines
  6/1/2010 - Conference papers
  In this study, NIOSH measured the atmospheric concentrations of DPM and gases in two mines in order to evaluate the effects of various control strategies on the atmospheric DPM concentrations.
• A New Method to Calculate Permeability of Gob for Air Leakage Calculations and for Improvements in Methane Control
  6/1/2010 - Conference papers
  This study demonstrates a fractal approach to calculating permeability of gob for air leakage that allows the calculation of porosity and permeability from the size distribution of broken rock material in the gob, which can be determined from image anal...
• 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.
• From Development to Evaluating Effectiveness in Industry: Building a Research Model for Noise Control Technology Efforts
  4/1/2010 - Conference papers
  A research model was developed to include metrics to evaluate and measure the effectiveness of noise control technologies. This model can be used to assess the development, dissemination, and evaluation of noise control technologies.
• Evaluation of Stiffeners for Reducing Noise from Horizontal Vibrating Screens
  4/1/2010 - Conference papers
  NIOSH is developing noise controls to reduce noise generated by horizontal vibrating screens. This paper documents testing of the stiffeners.
• Acoustic Assessment of Pneumatic and Electric Jackleg Drills used in the Mining Industry
  4/1/2010 - Conference papers
  This paper presents an acoustic assessment of pneumatic and electric jackleg drills involving Noise Source Identification (NSID), penetration rate measurements, operator’s cumulative noise dose measurements, and determination of sound power levels.
• Less Sound Underground: Reducing Roof Bolting Machine Drilling Noise
  4/1/2010 - Conference papers
  This article presents the most significant findings from NIOSH research to develop noise controls that reduce the sound at the operator’s position of mining machinery.
• A Control Suite to Reduce Roof Bolting Machine Drilling Noise
  4/1/2010 - Conference papers
  NIOSH conducted research to reduce the noise emission of various underground coal-mining equipment and developed a suite of controls to reduce drilling noise.