Results 21 - 27 of 27

• Geomechanics of Large Stone Structures: A Case History From the Washington National Cathedral
  7/1/2001 - Conference papers
  When the Washington National Cathedral showed signs of continuing differential settlement in the early 1990s, the U.S. Bureau of Mines was asked for assistance in monitoring the massive towers. This paper discusses the major findings of the study.
• Technology News 481 - Update: Roof Monitoring Safety System for Underground Stone Mines
  6/1/2000 - Technology News
  The Roof Monitoring Safety System (RMSS) introduced in late 1997 has been modified to improve durability and simplify the measurement of roof or rib movement.
• Hazard Recognition Training Program for Construction, Maintenance and Repair Activities
  10/1/1999 - NIOSH/USBM numbered publications
  Many miners are involved in tasks at the mine site that are similar to those subtasks performed in general construction, maintenance and repair (CMR) type work activities.
• Technology News 471 - Innovative Hazard Recognition Training for Underground Limestone Miners
  5/1/1998 - Technology News
  NIOSH has developed the Hazard Recognition Training Program for Underground Limestone to teach miners to recognize visual cues that distinguish poor ground conditions.
• Frictional Ignition of Natural Gas-Air Mixtures by Alternative Coal-Cutter Bit Shank Materials
  1/1/1992 - Reports of Investigations
  The Bureau of Mines tangentially impacted potential coal-cutter bit shank materials against sandstone to investigate the potential of the materials to ignite natural gas by a friction-generated hot streak.
• Influence of Overlying Strata on Methane Emissions in a Northern West Virginia Coal Mine
  1/1/1984 - Reports of Investigations
  Since 1970, abnormally high methane emissions have been observed in eastern sections of the Federal No. 2 Mine operating in the Pittsburgh coalbed in northern West Virginia. The nature and volume of these emissions indicate a source other than the coalb...
• Propagation of UHF Radio Waves in Limestone Room and Pillar Mines
  1/1/1979 - Contract reports
  This report presents a mathematical model for the propagation of UHF radio waves in the large cross section tunnels of a room-and-pillar limestone mine and describes the analysis of a small amount of propagation data obtained. The model and analysis is ...