Results 41 - 50 of 52

• 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...
• Investigation of a Rock-Burst Site, Sunshine Mine, Kellogg, Idaho
  1/1/1997 - Conference papers
  Rock masses in deep-level mines are subject to high stresses, which can result in unexpected failure of rock into mined-out openings. Personnel from two research centers of the former U.S. Bureau of Mines, Spokane and Twin Cities, investigated a rock b...
• 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.
• Stability Analysis of a Backfilled Room-and-Pillar Mine
  1/1/1995 - Reports of Investigations
  Displacement and stress changes in cemented backfill and ore pillars at the Buick Mine, near Boss, MO, were monitored by engineers from the U.S. Bureau of Mines and The Doe Run Co., St Louis, MO. Objectives of this research were to evaluate the effect ...
• Detection and Control of Spontaneous Heating in Coal Mine Pillars-A Case Study
  1/1/1995 - Reports of Investigations
  This U.S. Bureau of Mines study examined spontaneous heating episodes in coal mine pillars in an active underground coal mine. The objective of this study was to discover if the location of future events of pillar spontaneous heating could be inferred ...
• 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.
• Longwall Retreat of Gate Road Pillars
  1/1/1993 - Reports of Investigations
  This report investigates the removal of gate road chain pillars in conjunction with longwall retreat mining. The objective was to determine how the pillars, supplemental support, and entries were affected by the longwall abutment pressure.
• In Situ Stress Measurements Near the Ross Shaft Pillar, Homestake Mine, South Dakota
  1/1/1993 - Reports of Investigations
  In situ stresses are important input data for the design of safe, stable stope layouts and extraction sequences. In situ stresses were measured at the Homestake Mine, Lead, SD, using overcoring on hollow inclusion cells and borehole deformation gauges.
• Rib Stability: Practical Considerations to Optimize Rib Design
  1/1/1992 - Information Circulars
  Reviews the mechanics of rib failure and the relationship of coal mine geology and pillar constraint to rib instability. Strategies for choosing an effective method of rib support are considered and various rib support methods are discussed.
• Large-Scale Strata Response to Longwall Mining: A Case Study
  1/1/1992 - Reports of Investigations
  This U.S. Bureau of Mines report summarizes a study of large-scale strata response to longwall mining at a western U.S. coal mine. This study utilized surface and subsurface measurements, geologic mapping, in situ stress measurements, and pressure cell...