Results 271 - 280 of 344

• The Use of Light Scattering and Ion Chamber Responses for the Detection of Fires in Diesel Contaminated Atmospheres
  6/1/2002 - Peer reviewed journal articles
  Experiments were conducted to determine the optical scattering properties of diesel particulate matter (DPM) and various combustion aerosols from both flaming and smoldering combustion sources at discrete angles of 151 and 301 in the forward direction...
• Using Proximate Analysis to Characterize Airborne Dust Generation from Bituminous Coals
  6/1/2002 - Peer reviewed journal articles
  The amount of airborne respirable dust generated from breakage of different coals varies widely. This research was conducted to identify the facets of airborne respirable dust liberation from the coal product.
• 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...
• Improving Silica Dust Control Through Targeted Research
  2/1/2002 - Conference papers
  NIOSH conducted a strategic planning effort to identify those areas in mining with the greatest research needs. In response, the Pittsburgh Research Laboratory (PRL) has implemented a multi-faceted research program to improve silica dust control for the...
• Silica Dust Sources in Underground Metal/Nonmetal Mines - Two Case Studies
  2/1/2002 - Conference papers
  The ultimate goal of this research is to develop control technologies to reduce worker exposure to respirable silica dust. Dust surveys were conducted in an underground limestone and gold mine to investigate silica dust sources, generation levels, and ...
• An Evaluation of Methods for Controlling Silica Dust Exposures on Roof Bolters
  2/1/2002 - Conference papers
  This paper examines methods for limiting occupational silica exposures for roof bolting personnel in underground coal mining. It also evaluates a metal rake, a flexible insert, and a rigid insert for cleaning the roof bolter dust collector box.
• Reducing Enclosed Cab Drill Operator's Respirable Dust Exposure at Surface Coal Operation With a Retrofitted Filtration and Pressurization System
  2/1/2002 - Conference papers
  This report discusses a cooperative research study performed on a surface drill retrofitted with a new pressurization and filtration system. Respirable dust concentrations were substantially reduced from 0.64 mg/m3 during pre-testing to 0.05 mg/m3 duri...
• NIOSH Ventilation Research Addressing Diesel Emissions and Other Air Quality Issues in Nonmetal Mines
  2/1/2002 - Conference papers
  Discusses current NIOSH research to improve mine ventilation and mine air quality, particularly for large opening mines.
• The Effects of Low Quartz Mass Loading and Spatial Variability on the Quartz Analysis of Surface Coal Mine Dust Samples
  9/1/2001 - Peer reviewed journal articles
  The objectives of this work are to 1) evaluate the performance of the P7 method on field samples of low quartz mass loadings, 2) evaluate the magnitude of dust mass spatial variability within an enclosed cab environment, and 3) estimate the subsequent p...
• Estimate of Technically Feasible DPM Levels for Underground Metal and Nonmetal Mines
  9/1/2001 - Peer reviewed journal articles
  A method was developed to estimate the average workplace concentration of DPM that could be expected from using the new lower DPM-emitting engines now being approved by MSHA.