Results 191 - 200 of 229

• Design of Primary Roof Support Systems in U.S. Coal Mines Based on the Analysis of Roof Fall Rates
  6/1/2001 - Conference papers
  A study is described where information was collected at 37 coal mines on roof falls and other geotechnical, mining, geologic, and roof bolting factors. A statistical analysis was conducted on the data with roof fall rate as the outcome variable.
• Overview of Ground Control Research for Underground Coal Mines in the United States
  6/1/2001 - Conference papers
  NIOSH has developed an entire toolbox of computer programs that have been effectively transferred to the mining community.
• Technology News 483 - Safety Training Tools for Rock Scaling Personnel
  1/1/2001 - Technology News
  Scaling, the removal of loose rock from the roofs and walls of a mine by manual or mechanized means, may be necessary during any stage of mining. Manual scaling is very labor intensive, and mechanical methods can be too powerful and actually produce a l...
• 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.
• The Forgotten Denominator: Pillar Loading
  8/1/2000 - Conference papers
  This paper addresses a deficit in pillar loading research by exploring the accuracy of empirical abutment load calculations using insight provided by an elastic overburden model, a laminated overburden model and field observations.
• Technology News 482 - Ground Support Safety Training Video
  7/1/2000 - Technology News
  This video, entitled "Ground Support...It's Important, or Miner Mike Saves the Day," presents information on why ground supports work and how to install them properly.
• 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.
• Field Tests of Cable Bolts Using Instrumented King Wires
  3/1/2000 - Conference papers
  Instrumented cable bolts developed at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health were used in conjunction with existing ground control to monitor rock mass loads at various field sites.