Results 111 - 112 of 112

• 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 ...
• 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.