Results 11 - 15 of 15

• Technology News 500 - Using In-Place Stone Stoppings to Direct Air in Underground Stone Mines
  12/1/2002 - Technology News
  The growing realization of the importance of a healthy work environment along with increased regulations will require many stone mines to implement new ways to improve ventilation. In-place stone stoppings are one option.
• Practical Techniques to Improve the Air Quality in Underground Stone Mines
  10/1/2002 - Conference papers
  Overview of a variety of techniques and methods that can be used to improve the air quality in underground stone mines.
• Load and Deflection Response of Ventilation Stoppings to Longwall Abutment Loading: A Case Study
  8/1/2001 - Conference papers
  This paper presents investigations of underground measurements conducted to determine the loading response of stoppings constructed from lightweight aggregate concrete masonry units.
• 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.
• Leakage and Performance Characteristics of Large Stoppings for Room-and-Pillar Mining
  1/1/1988 - Reports of Investigations
  This report presents a Bureau of Mines study comparing the construction costs, leakage measurements, and predicted performance of different types of large stoppings built and tested in a room-and- pillar oil shale mine.