Results 61 - 70 of 514

• Assessing and Monitoring Open Pit Mine Highwalls
  8/1/2001 - Conference papers
  This paper introduces warning signs of slope instability so operators are better able to recognize hazards. The most common slope monitoring equipment and practical methods of installation are discussed as well as the limitations of these systems.
• Using the Coal Mine Roof Rating (CMRR) to Assess Roof Stability in U.S. Coal Mines
  8/1/2001 - Peer reviewed journal articles
  The CMRR quantifies defects in the rock mass and compiles a strength value used for engineering design. The CMRR has been applied to a number of ground stability problems. The CMRR procedure and some of these applications are described in this paper.
• 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.
• Roof Monitoring Helps Prevent Injuries in Stone Mines
  11/1/2000 - Peer reviewed journal articles
  The Roof Monitoring Safety System (RMSS) is described, compared to other roof-monitoring technology, and described in context with proactive ground control plans for stone mines.
• Analysis of Safety Aspects and Mining Practices for Effective Ground Control in Surface Mining
  8/1/2000 - Conference papers
  To determine causes of slope failure and highwall/spoilbank failure, this study reviews accident statistics, surface mining laws, the relevant literature, and observations from mine visits. The study emphasizes surface mines in WV, OH, and PA.
• Economics of Safety at Surface Mine Spoil Piles
  7/1/2000 - Reports of Investigations
  Short-dumping rather than edge-dumping might reduce dumping-related accidents, but many operators believe it is less cost effective. To evaluate this perception, NIOSH reviewed the costs of various dumping methods at waste and spoil piles.
• Roof Monitoring in Limestone - Experience with the Roof Monitoring Safety System (RMSS)
  1/1/2000 - Conference papers
  This paper outlines the evolution of the RMSS and how it can be used in a comprehensive, proactive ground control safety program. A case history describes the RMSS being used to evaluate a mechanical impact sealing machine at a limestone mine.
• Utilizing the 'Advance and Relieve' Method to Reduce Horizontal Stress Affects on the Mine Roof, A Case Study
  1/1/2000 - Conference papers
  The practical application of the "advance and relieve" method is discussed. A trial of the method was conducted for a room and pillar coal operation that was experiencing roof cutters and long running roof falls caused by high horizontal stresses.
• A Portable Spectro-Polarimetric Imager: Potential Mine Safety and Geologic Applications
  3/1/1999 - Conference papers
  High-resolution hyperspectral imagery operating in the visible to shortwave infrared can help identify and map argillic zones in host rocks; these zones add a significant risk in assessing and modeling catastrophic slope movement in open-pit mines.
• Controlling Roof Beam Failures From High Horizontal Stresses in Underground Stone Mines
  8/1/1998 - Conference papers
  A design technique is presented which provides stone miners with a method for making stability assessments. The consequences of widening rooms, changing geology and horizontal stresses, and different rock bolts on roof beam failure are discussed.