Results 1 - 8 of 8

• Ground and Standing Support Interaction in Tailgates of Western U.S.Longwall Mines Used in the Development of a Design Methodology Based on the Ground Reaction Curve
  7/1/2010 - Conference papers
  Instrumented test sites were installed in the tailgates of two western longwall operations; results of the support performance and ground reaction are presented in terms of developed support loads and displacements and tailgate entry convergence.
• A First Step in Developing Roof Support Design Criteria Based on Ground Reaction Data for Pittsburgh Seam Longwall Tailgate Support
  7/1/2008 - Conference papers
  In this NIOSH study to optimize standing roof support design, ground response curves were developed for longwall tailgate conditions from numerical models of Pittsburgh Coal Seam geology.
• Development of Ground Response Curves for Longwall Tailgate Support Design
  6/1/2006 - Conference papers
  This paper presents the results of a study into the ground response around tailgate entries using numerical models. The potential exists to develop site-specific tailgate design curves by combining model results with field observations.
• Evaluation of the Impact of Standing Support on Ground Behavior in Longwall Tailgates
  8/1/2005 - Conference papers
  The conclusion drawn from this study was that standing supports do not have sufficient capacity to control main roof or floor loading or prevent the resulting convergence of the tailgate entry.
• Standing Support Alternatives in Western Longwalls
  2/1/2005 - Conference papers
  Western mines have had limited choices for standing support. This paper compares the performance characteristics of various support systems.
• Pumpable Roof Supports: Developing Design Criteria by Measurement of the Ground Reaction Curve
  8/1/2003 - Conference papers
  Pumpable roof supports provide an alternative longwall tailgate roof support and have grown in usage recently. Despite the success of these supports, questions remain regarding critical design issues for optimizing the use of this technology.
• 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.
• Design Methodology for Standing Secondary Roof Support in Longwall Tailgates
  8/1/1999 - Conference papers
  This paper discusses a design methodology for standing secondary tailgate supports, using the performance characteristics generated in the NIOSH Mine Roof Simulator (MRS) to match load characteristics of various supports to ground reaction behavior.