Results 261 - 270 of 646

• The Evolution of Intelligent Coal Pillar Design: 1981-2006
  8/1/2006 - Conference papers
  This paper discusses progress in the science of coal pillar design over the past 25 years and some of the current research needs.
• Post-Explosion Observations of Experimental Mine and Laboratory Coal Dust Explosions
  8/1/2006 - Conference papers
  NIOSH and MSHA conducted joint research on dust explosions by studying post-explosion dust samples of high and low volatile bituminous coals collected from full-scale explosions at NIOSH's Lake Lynn Experimental Mine and from laboratory explosions.
• A Retrospective Assessment of Longwall Roof Support with a Focus on Challenging Accepted Roof Support Concepts and Design Premises
  8/1/2006 - Conference papers
  This paper explores the history of longwall shield design over the past 25 years. It also addresses questions such as whether two-legged designs are better than four-legged shields and whether setting pressures should be set as high as possible.
• Field Verification of the Roof Fall Risk Index: a Method to Assess Strata Conditions
  8/1/2006 - Conference papers
  The Roof Fall Risk Index helps the underground stone mine operator to assess defects of the mine strata and rate the relative roof fall risk these defects pose. This paper shows how the defect information is collected and methods to analyze the data.
• The Effects of Water Emulsified Fuel on Diesel Particulate Matter Concentrations in Underground Mines
  6/1/2006 - Conference papers
  The ambient diesel particulate matter (DPM) concentrations (at the intakes and exhausts of the mine) was evaluated as an entire vehicle fleet of a stone mine switched from using 35% biodiesel to a water-emulsified fuel (PuriNOx).
• Implementation of Diesel Particulate Filter Technology in Underground Metal and Nonmetal Mines
  6/1/2006 - Conference papers
  This paper provides detailed analysis of some of those challenges and short overviews of several projects launched by the NIOSH Pittsburgh Research Laboratory in an attempt to provide the underground mining industry with more adequate DPF systems.
• Evaluation of the SKC, Inc. Dust Detective
  6/1/2006 - Conference papers
  The relationship of dust concentrations measured by personal gravimetric samplers to those measured by the SKCDD, an affordable, person-wearable, real-time dust monitor. 
• Numerical Modeling Procedures for Practical Coal Mine Design
  6/1/2006 - Conference papers
  A method is presented for creating realistic numerical models for practical coal mine ground control. This procedure enables realistic comparisons of the effectiveness of alternative rock support systems.
• Lowering Respirable Dust at an Iron Ore Concentrator Plant Through Improved Ventilation Practices
  6/1/2006 - Conference papers
  A cooperative research effort was established to lower respirable dust levels in an iron ore grinding and concentrator plant. The most significant improvement was realized by changing the ventilation profile throughout the entire facility. Another succe...
• Mine Fires - Measuring the Efficacy of Gas-Enhanced Foam
  6/1/2006 - Conference papers
  NIOSH conducted research with U.S. Foam Technologies, Inc. and On Site Gas Systems, Inc., on the remote application of extinguishing agents to improve deployment strategies, and limit miner exposure and ensure the best outcome during a mine fire.