Results 91 - 100 of 102

• 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.
• NIOSH Hazard ID 1 - Exposure to Silica Dust on Continuous Mining Operations Using Flooded-Bed Scrubbers
  8/1/1997 - Hazards IDs
  A study was conducted examining the risk of silica dust exposure in mine workers exposed to continuous miners equipped with flooded bed scrubbers.
• Impact of Unbalanced Intake and Scrubber Flows on Face Methane Concentrations
  2/1/1997 - Conference papers
  Research was conducted to investigate how ventilation of a mining face is affected when scrubber flow is greater or less than intake flow.
• 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.
• Inflatable Partitions for High-Expansion Foam Generators
  6/1/1995 - Peer reviewed journal articles
  The U.S. Bureau of Mines (USBM) has developed an inflatable feed-tube seal (IFTS) for high-expansion foam generators. The IFTS is a lightweight, portable, rectangular inflatable bag that can be used by firefighters to rapidly seal large openings, such a...
• 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...
• Jet Fan Ventilation in Very Deep Cuts - A Preliminary Analysis
  1/1/1992 - Reports of Investigations
  This report investigates that application of jet fans to ventilate cuts that extend beyond 40 feet. The results of tests involving a jet fan in a 90 foot entry, its benefits and potential problems are discussed.
• 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...
• Evaluating Ventilation Parameters of Three Coal Mine Gobs
  1/1/1986 - Information Circulars
  The Bureau of Mines used sulfur hexafluoride (sf6) tracer gas to evaluate the effectiveness of gob ventilation and/or sealing practices at three coal mines, each having different problems associated with their mined-out areas.
• Reverse Performance Characteristics of Main Mine Fans
  8/1/1983 - Open File Reports
  Laboratory and field tests of vane axial main mine fans in the 7- to 9-ft diameter size range were conducted to establish forward and reverse performance characteristics under controlled conditions and at typical mine installations.