Results 381 - 390 of 646

• Field Test with Strain-Gauged Friction Bolts at the Gold Hunter Mine, Mullan, Idaho, USA
  8/1/2003 - Conference papers
  To measure the loading behavior of friction bolts, NIOSH researchers installed strain gauges on the interior of friction bolts and developed a miniature data acquisition system (MIDAS) that fits inside the hollow portion of the friction bolt.
• Root Causes of Groundfall Related Incidents in U.S. Mining Industry
  8/1/2003 - Conference papers
  This paper utilizes rock-fall-related incident narratives from the MSHA database for a taxonomic analysis, which identifies event root causes and provides future direction for corrective measures to reduce the probability of event occurrence.
• Recent National Institute for Occupational Safety and Health Research Using Ground Penetrating Radar for Detection of Mine Voids
  7/1/2003 - Conference papers
  This study indicates that it may be possible to use ground penetrating radar (GPR) for initial underground mine studies followed by directional drilling to accurately delineate the extent and position of adjacent abandoned mine workings.
• Shear Origin of Tension in Excavation-Induced Fractures
  6/1/2003 - Conference papers
  The authors hypothesize that excavation-induced extension fractures are caused by elastic shearing displacement that in turn causes tension oblique to a propagating shear zone.
• In Situ Stress Measurements at the Stillwater Mine, Nye, Montana
  6/1/2003 - Conference papers
  Using hollow inclusion stress cells, researchers obtained two in situ stress measurements from the face of two footwall lateral drifts at the Stillwater Mine near Nye, MT.
• Design and Instrumentation of a Large Reverberation Chamber
  6/1/2003 - Conference papers
  Documents the refurbishing and instrumentation of the PRL reverberation chamber to bring it up to compliance with the ISO 3743-2 standard for engineering grade measurements for broadband noise.
• Evaluation of Engineering Noise Controls for a Continuous Miner Conveyer System
  6/1/2003 - Conference papers
  This paper analyzes extensive noise and urethane durability testing on a Joy 14CM9 continuous miner's conveyor assembly, tail roller, and bottom plate conducted at NIOSH's Pittsburgh Research Laboratory facilities.
• Estimated Sound Power Radiated by Surfaces on a Continuous Miner Tail Section Using Vibration Measurements
  6/1/2003 - Conference papers
  This paper identifies the most significant noise-radiating surfaces on a continuous miner tail section and examines the effects of three engineering noise controls.
• Longwall Tailgates: The Technology for Roof Support Has Improved, but Optimization is Still Not There
  6/1/2003 - Conference papers
  The primary objective of the paper will be to discuss strata mechanics and ways in which the support and strata interaction can be evaluated to provide an optimized secondary support design, particularly standing support systems, for longwall tailgates.
• Tell Me a Story: Using Narrative to Teach Safety to Skilled Blue-Collar Workers
  3/1/2003 - Conference papers
  A discussion of how training videos created to get safety messages to miners were developed, how "master miners" and story lines were chosen, and how the resulting videos have been received in the mining industry.