Results 561 - 570 of 646

• Performance and Safety Considerations of Hydraulic Support Systems
  8/1/1998 - Conference papers
  This paper examines the operating principles of hydraulic cylinders and discusses issues pertaining to setting loads, support stiffness, yielding behavior, errors in assessing support loading, and hydraulic failure mechanisms and how to detect them.
• A Case Study of Bolt Performance in a Two-entry Gate Road
  8/1/1998 - Conference papers
  This paper presents the results of a case study conducted in a two-entry gateroad in a coal mine where excessive roof deformation and bolt loading resulted in failure of many roof supports.
• A Comparison of Longwall & Continuous Mining Safety in U.S. Coal Mines 1988-1997
  6/1/1998 - Conference papers
  This paper contains the results of an examination of accident, injury, employment, and production information reported to the U.S. Department of Labor's Mines Safety and Health Administration (MSHA) and provides information on some of the measures longw...
• Subsidence Prediction Using a Laminated, Boundary-Element Program
  6/1/1998 - Conference papers
  Historically, the surface subsidence over underground coal mines has been predicted using empirical profile or influence functions which have little or no connection to the actual mechanics of the subsidence. This paper presents a case study where a me...
• Innovative Strategies for Mine Fire Preparedness
  6/1/1998 - Conference papers
  There has been some improvement in overall mine fire preparedness. However, little data has been gathered on a site-by-site basis to determine what improvements might be made on a local level.
• Mine Rescue Training Simulations and Technology
  5/1/1998 - Conference papers
  Reports on a series of mine rescue training exercises developed, conducted and evaluated by the National Institute for Occupational Safety and Health (NIOSH) in cooperation with the Pennsylvania Department of Environmental Protection, Bureau of Deep Min...
• Surveillance of Disaster - A View From the Denominator
  5/1/1998 - Conference papers
  The National Institute for Occupational Safety and Health (NIOSH) is dedicated to achieving "safety and health at work for all people - through research and prevention." An important procedure in pursuing this goal is the NIOSH surveillance studies wh...
• Design Analysis of Underground Mine Ore Passes: Current Research Approaches
  5/1/1998 - Conference papers
  The U.S. Mine Safety and Health Administration (MSHA) has identified ore pass hazards as s significant safety problem in underground metal mines in the United States. Researchers at the Spokane Research Laboratory of the National Institute for Occupati...
• Training to Improve Emergency Communication Skills
  5/1/1998 - Conference papers
  This paper introduces a method for teaching workers to communicate necessary information when giving or receiving emergency warning messages.
• A Static Fatigue Constitutive Law for Joints in Weak Rock
  4/1/1998 - Conference papers
  Researchers from the Spokane Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) are developing numerical modeling tools to forecast time-dependent deformation around coal mine entries.