Results 131 - 140 of 140

• Simplified Pre- and Post-Processing Technique for Performing Finite-Element Analyses of Deep Underground Mines
  8/1/1997 - Conference papers
  Demonstration of a technique developed at the Spokane Research Center that allows the user to create a finite-element model of a two-dimensional section of an underground mine in a relatively straightforward manner.
• Technology News 464 - Analysis of Retreat Mining Pillar Stability (ARMPS): Version 4.0 for Windows
  7/1/1997 - Technology News
  The analysis of Retreat Mining Pillar Stability (ARMPS) computer program was developed in 1995 and has been widely accepted by the mining community. A Windows version of ARMPS is now available. It features simplified data input, graphics, and an expande...
• Proceedings: Mechanics and Mitigation of Violent Failure in Coal and Hard-Rock Mines
  5/1/1995 - NIOSH/USBM numbered publications
  Papers presented at a USBM technology transfer seminar describe the causes of violent material failure in U.S. mines, measurement techniques for monitoring events that result in violent failure, and mitigation techniques for controlling failure.
• Technology News 445 - Updated Analysis of Longwall Pillar Stability (ALPS) Computer Program Incorporates New Coal Mine Roof Rating (CMRR)
  2/1/1995 - Technology News
  The objective of this work is to develop a comprehensive, practical method for designing longwall gate entries that considers coal pillar size, mine roof quality, and artificial support in an easy-to-use computer program.
• Pillar Design and Strategies for Retreat Mining
  1/1/1994 - NIOSH/USBM numbered publications
  A computer program called Analysis of Retreat Mining Pillar Stability (ARMPS) is field tested and refined in order to estimate abutment pressures developed during pillaring. It can be successfully employed to predict pillar line stability.
• Optimum Mine Designs to Minimize Coal Bumps: A Review of Past and Present U.S. Practices
  2/1/1992 - Book chapters
  This presents a review of past and present United States mining practices for optimum design to minimize coal bumps.
• Analysis and Design Considerations for Superimposed Longwall Gate Roads
  1/1/1992 - Information Circulars
  A U.S. Bureau of Mines investigation of longwall panel layouts to maximize coal recovery and minimize interactive problems in multiple-seam operations.
• The Effects of Roof and Floor Interface Slip on Coal Pillar Behavior
  1/1/1990 - Conference papers
  This U.S. Bureau of Mines paper discusses the importance of an interface slip mechanism between the coalbed and the surrounding strata in controlling the extent and pattern of stresses and deformations in a coal pillar.
• Coal Mine Bumps: Five Case Studies in the Eastern United States
  1/1/1987 - Information Circulars
  Information was collected at 5 bump-prone mines. Among the findings, two geologic conditions have been found to cause bumps in the eastern U.S.: relatively thick overburden and extremely rigid strata immediately above and below the mine coalbed.
• Determining Cleat Orientation of Deeper Coalbeds From Overlying Coals
  1/1/1976 - Reports of Investigations
  Examination of several coalbeds in Walker County, Alabama, Cambria, Greene, and Fayette Counties, Pennsylvania, and Caleigh and Wyoming Counties, West Virginia, indicates that cleat orientations are similar throughout a vertical sequence of strata. Stud...