Results 81 - 90 of 270

• Evaluation of Polymer Construction Material and Water Trap Designs for Underground Coal Mine Seals
  1/1/1996 - Reports of Investigations
  Strength characteristics and air leakage resistance of seals and designs of water traps used in underground coal mines were evaluated in a joint effort by the Pittsburgh Research Center and the Mine Safety and Health Administration.
• Evaluation of Reinforced Cementitious Seals
  8/1/1999 - Reports of Investigations
  NIOSH cooperated with Tecrete Industries Pty. Ltd. and BHP Australia Coal to evaluate the strength characteristics and air leakage of four seal and two stopping designs for use in underground coal mines.
• Evaluation of Smoke Detectors for Mining Use
  1/1/1995 - Reports of Investigations
  The U.S. Bureau of Mines has constructed a smoke chamber and developed sensitivity tests for smoke detectors. Evaluation of six smoke detectors showed their potential for use as mine fire sensors or as part of a mine atmospheric monitoring system.
• Evaluation of Solid-Block and Cementitious Foam Seals
  1/1/1991 - Reports of Investigations
  The U.S. Bureau of Mines conducted explosion tests on various full- scale cementitious bulkheads used in abandoned mine areas to evaluate the ability of the bulkheads to withstand gas explosion overpressures of 20 psig. Tests were performed on 120-ft2 s...
• Evaluation of Systems to Monitor Blind Areas Behind Trucks Used in Road Construction and Maintenance: Phase 1
  2/1/2003 - Reports of Investigations
  NIOSH is evaluating methods to decrease accidents including one that uses devices that assist equipment operators in monitoring blind areas around the equipment to prevent collisions with workers on foot or other objects.
• Evaluation of the Seismic System for Locating Trapped Miners
  11/1/1981 - Reports of Investigations
  This report discusses the configuration and system deployment for the postdisaster surface seismic system for detecting and locating trapped miners.
• Experimental Studies on the Origin and Accumulation of Coalbed Gas
  1/1/1978 - Reports of Investigations
  The Bureau of Mines investigated factors that influence the formation of methane and other hydrocarbon gases in coal, which is an integral part of the coalification process.
• Explosion Effects on Mine Ventilation Stoppings
  11/1/2008 - Reports of Investigations
  A joint MSHA and NIOSH study simulated actual coal mine explosion accidents to evaluate blast effects on typical U.S. mine ventilation stoppings, and presents construction and testing methods, explosion test data, and post-explosion conditions.
• Face Ventilation Measurement with Sulfur Hexafluoride (SF6)
  1/1/1980 - Reports of Investigations
  The face ventilation measurement method developed by the Bureau of Mines involves releasing a small volume of tracer gas (SF6) on the off-curtain side of the working face at the start of the mining cycle.
• Facilitating the Use of Built-in-place Refuge Alternatives in Mines
  4/1/2015 - Reports of Investigations
  An RI that explores 3 issues to facilitate use of BIP RAs: (1) locating BIP RAs further from the face; (2) providing a consistent process for the design and approval of RA stoppings; (3) delivering a reliable supply of clean, breathable air to a BIP RA.