Results 441 - 450 of 646

• Technology for Remote Mine Seal Construction
  2/1/2002 - Conference papers
  Mine fires can be especially perilous because toxic products can quickly spread well beyond the fire zone thereby exposing all underground miners to dangerous and deadly conditions. This paper provides a review of the available materials and technology ...
• 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.
• 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.
• 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.
• 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.
• Development of an Automated PC-Network-Based Seismic Monitoring System
  12/1/2001 - Conference papers
  An automated PC-network-based seismic data acquisition and processing system has been developed by NIOSH for use in mine safety studies. Several systems have been constructed and deployed in the field for testing and application. These systems are now b...
• An Alarm to Warn of Overhead Power Line Contact by Mobile Equipment
  9/1/2001 - Conference papers
  A report on research to develop a device that alerts workers when a power line has been contacted by equipment. The approach being investigated is based on measuring electric current flow to ground through a machine during a line contact.
• Current NIOSH Dust Control Research for Noncoal Surface Mines
  9/1/2001 - Conference papers
  This report focuses on two areas of research to lower miners' exposure to respirable dust at surface operations. These areas deal with enclosed cabs methods to lower dust levels at surface drills.
• An Environmentally Robust Proximity Warning System for Hazardous Areas
  9/1/2001 - Conference papers
  NIOSH has developed a patented active proximity warning system called HASARD (Hazardous Area Signaling and Ranging Device) which employs low-frequency, low-power magnetic fields which are quite impervious to severe environmental conditions.