Results 231 - 240 of 270

• Self-Contained Self-Rescuer Field Evaluation: Fourth-Phase Results
  1/1/1994 - Reports of Investigations
  A joint effort by the U.S. Bureau of Mines (USBM) and the U.S. Mine Safety and Health Administration (MSHA) was undertaken to determine how well self-contained self-rescuers (SCRS's), deployed in accordance with Federal regulations (30 CFR 75.1714), hel...
• Self-Contained Self-Rescuer Field Evaluation: Results From 1982-90
  1/1/1992 - Reports of Investigations
  A joint effort by the Bureau of Mines and the U.S. Mine Safety and Health Administration was undertaken to determine how well self-contained self-rescuers, deployed in accordance with Federal regulations survived the underground environment with regard ...
• Self-Contained Self-Rescuer Field Evaluation: Seventh-Phase Results
  3/1/2002 - Reports of Investigations
  The National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, has undertaken a study to determine how well self-contained self-rescuers (SCSRs), deployed in accordance with Federal regulations (30 CFR 75....
• Self-Contained Self-Rescuer Long Term Field Evaluation Tenth Phase Results
  6/1/2008 - Reports of Investigations
  This report is the last of 10 report phases begun in 1982 and presents findings regarding laboratory-tested SCSRs in the tenth phase of testing, from July 2004 to March 2006.
• Self-Contained Self-Rescuer Long Term Field Evaluation: Combined Eighth and Ninth Phase Results
  10/1/2006 - Reports of Investigations
  NIOSH and the Mine Safety and Health Administration (MSHA) are conducting a Long Term Field Evaluation (LTFE) program to evaluate deployed self-contained self-rescuers (SCSRs). The objective of the program is to evaluate how well SCSRs endure the underg...
• A Short-Range Locator System for Detecting Trapped Miners
  1/1/1984 - Reports of Investigations
  A short-range locator system capable of locating trapped miners has been devised. The system consists of a light-weight, low-power radio transmitter incorporated into a miners cap lamp battery and a directional receiver carried by rescuers.
• Shotcrete Design and Installation Compliance Testing: Early Strength, Load Capacity,Toughness, Adhesion Strength, and Applied Quality
  4/1/2015 - Reports of Investigations
  A report on a research study to document and develop safe practices for the use of shotcrete as ground support in underground mines, particularly in underground metal mines operating in weak host rock.
• Simulation of Methane Flows in Noncoal Mines
  1/1/1984 - Reports of Investigations
  The Bureau of Mines has successfully tested a method to simulate methane (CH4) flows from face areas through the returns of noncoal mines. This technique involves releasing a small quantity of tracer gas at a working area and sampling for that gas downs...
• 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 ...
• Strength Characteristics and Air-Leakage Determinations for Alternative Mine Seal Designs
  1/1/1993 - Reports of Investigations
  During the normal course of underground coal mining, it sometimes becomes necessary to seal off abandoned areas to eliminate the need to ventilate them. Seals also are used to isolate fire zones or areas susceptible to spontaneous combustion. The object...