Results 111 - 120 of 128

• A Study of the Ground Control Effects of Mining Longwall Faces Into Open or Backfilled Entries
  1/1/2001 - Peer reviewed journal articles
  This paper summarizes case studies where unusual circumstances required that a longwall retreat into or through previously driven rooms. Two types of roof failure are identified and discussed.
• Best Practices to Mitigate Injuries and Fatalities from Rock Falls
  8/1/2000 - Conference papers, Safety guidelines, tips, and checklists
  This paper presents an overview of the most significant ground control hazards facing today's mineworkers, as well as best practices to reduce these risks.
• Determination of Physical Properties of Cable Bolts in Cement Grout Pull Tests Using Instrumented King Wires
  4/1/2000 - Conference papers
  Researchers are investigating the physical properties of cable bolts by replacing the conventional king wire with a modified king wire on which strain gauges have been installed.
• Creep Along Weak Planes in Roof and How It Affects Stability
  3/1/2000 - Conference papers
  A NIOSH study of the time-dependent response of rock stressed along weakness planes with the objective to improve mine safety by reducing the number of roof falls that cause injuries and fatalities to miners.
• Analysis of Pillar Design Practices and Techniques for U.S. Limestone Mines
  12/1/1999 - Peer reviewed journal articles
  As underground stone mining expands to deeper cover and more efficient methods are used, effective stone pillar design methods become more important. In this paper, 72 stone mine pillar designs are examined for factors affecting stability.
• Preventing Injuries Caused by Unrecognized Stone Mine Roof Beam Failures With a Pro-Active Roof Control Plan
  3/1/1999 - Conference papers
  To help mitigate the potential for falls-of-ground injuries to underground stone miners, NIOSH developed the Roof Monitoring Safety System (RMSS) to aid in monitoring dangerous levels of roof beam deflection.
• Rock Falls - Preventing Rock Fall Injuries in Underground Mines
  1/1/1999 - NIOSH/USBM numbered publications, Videos and multimedia
  This video teaches the importance of proper roof scaling in underground mining to avoid injury and improve work conditions.
• Technology News 476 - Instrumented King Wire for Monitoring Cable Bolts
  11/1/1998 - Technology News
  Development of methods and tools to assist in the evaluation and selection of rock supports could reduce the number of unplanned rock falls significantly.
• Advances in Remote Sensing Techniques for Monitoring Rock Falls and Slope Failures
  8/1/1998 - Conference papers
  This paper describes the potential adaption of systems such as interferometric synthetic aperture radar, imaging spectroscopy, and time-domain reflectometry, to slope monitoring and design.
• Factors Influencing Intersection Stability in U.S. Coal Mines
  8/1/1998 - Conference papers
  Based on field investigations and a U.S. coal mines database containing 12 mines and 639 roof falls, NIOSH determines the factors that influence intersection instability and provides guidelines for the safe excavation and support of intersections.