Results 71 - 80 of 504

• Continuous Wave Laser Ignition Thresholds of Coal Dust Clouds
  8/1/2003 - Peer reviewed journal articles
  Laser-based instruments are used in areas where coal dust ignition presents a safety hazard. This NIOSH study determines when an optical beam may be considered a potential ignition source in underground coal mines or coal storage facilities.
• Evaluation of Systems to Monitor Blind Areas Behind Trucks Used in Road Construction and Maintenance: Phase 1
  2/1/2003 - Reports of Investigations
  NIOSH is evaluating methods to decrease accidents including one that uses devices that assist equipment operators in monitoring blind areas around the equipment to prevent collisions with workers on foot or other objects.
• Emerging Technologies: Aiding Responders in Mine Emergencies and During the Escape From Smoke-Filled Passageways
  12/1/2001 - Conference papers
  Technology and realistic training simulations have been identified for the general workforce and mine emergency responders. Laser lights and lifelines were beneficial in leading personnel to safety and out of the mine in smoke-filled passageways.
• Assessing and Monitoring Open Pit Mine Highwalls
  8/1/2001 - Conference papers
  This paper introduces warning signs of slope instability so operators are better able to recognize hazards. The most common slope monitoring equipment and practical methods of installation are discussed as well as the limitations of these systems.
• Analysis of Roof Bolt Systems
  8/1/2001 - Conference papers
  A statistical study of roof bolt performance was conducted in 37 U.S. mines. Analysis of the results led to guidelines for making preliminary estimates for bolt length, capacity, and pattern to improve roof stability in difficult conditions.
• Mistakes, Misconceptions, and Key Points Regarding Secondary Roof Support Systems
  8/1/2001 - Conference papers
  This paper discusses misconceptions about how roof supports perform and factors that impact their performance. The paper is limited to a discussion of secondary roof support systems and powered roof supports such as longwall shields.
• Responders to Underground Mine Fires
  8/1/2001 - Conference papers
  Fire is a major concern for those who work in underground mines. This paper focuses on responders' preparedness for fire.
• Advance and Relieve Mining: A Method to Mitigate the Effects of High Horizontal Stress on the Mine Roof
  2/1/2001 - Conference papers
  Evaluation of the "Advance and Relieve" mining method is described to determine effectiveness for conditions where high horizontal stresses caused long running roof falls resulting in hazardous conditions and the premature abandonment of panels.
• Proceedings: New Technology for Coal Mine Roof Support
  10/1/2000 - Information Circulars
  The proceedings provide information on several new technologies including guidelines for roof bolt length, pattern, and capacity; a new design method for longwall tailgate supports; and a technique for measuring loads developed within cable bolts.
• Mine Rescue and Response
  9/1/2000 - Conference papers
  This paper describes technology and training that has been identified for underground emergency responders.