Results 11 - 20 of 92

• 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.
• Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
  8/1/2000 - Conference papers
  The 1990s saw an unprecedented increase in technologies for more effective, easier to install roof support in underground mines. To facilitate application and improve mine safety, NIOSH developed the Support Technology Optimization Program (STOP).
• Application of the Coal Mine Roof Rating (CMRR) to Extended Cuts
  4/1/1999 - Peer reviewed journal articles
  The Coal Mine Roof Rating (CMRR) has been widely accepted as a tool for geologic characterization and mine planning. The application of the CMRR to extended cuts (cuts greater that 6 m (20 ft) in length) is discussed.
• Technology News 455 - Roof Hazard Alert Modules
  5/1/1997 - Technology News
  The new permissible-type, intrinsically safe design modules described here represent an engineering intervention strategy toward improving miners' ability to recognize and avoid the hazardous zone of unsupported mine roof.
• Geologic Characterization
  3/16/2021 - Research areas
  Geologic Characterization Topic Page
• Building Capacity and Enhancing Long-Term Coal mine Weak Roof Stability through Characterization and Modeling of Time-Dependent and Moisture-Sensitive Failure in Shale
  9/18/2020 - Contracts and cooperative agreements
  A capacity building contract with Penn Sate University.
• Evaluation of Stress-control Layout at the Subtropolis Mine, Petersburg, Ohio
  1/1/2020 - Peer reviewed journal articles
  A paper detailing the positive aspects, as well as the challenges, of implementing a new stress-control mine layout.
• Ground Response to High Horizontal Stresses During Longwall Retreat and its Implications for Longwall Headgate Support
  2/19/2019 - Peer reviewed journal articles
  An article discussing roof support requirements in the longwall headgate under high horizontal stress in regard to the pattern of supplemental cable bolts and the critical locations where additional supplemental support is necessary.
• Support Design Procedures for Difficult Ground Conditions
  10/22/2016 - Research projects
  A project to develop engineering guidelines for support design that will reduce groundfall fatalities under supported roof in underground coal mines.