Results 31 - 40 of 412

• Computational Fluid Dynamics Modeling of Spontaneous Heating in Longwall Gob Areas
  12/1/2007 - Peer reviewed journal articles
  Computational Fluid Dynamics simulations were conducted to investigate the spontaneous heating of coals in longwall gob areas with different apparent activation energies and reaction surface areas. The results are reported in this paper.
• Development and Application of Reservoir Models and Artificial Neural Networks for Optimizing Ventilation Air Requirements in Development Mining of Coal Seams
  11/1/2007 - Peer reviewed journal articles
  Using coalbed methane reservoir modeling and an artificial neural network (ANN) design for prediction and optimization of methane inflows and ventilation air requirements to maintain methane concentrations below statutory limits.
• Preventing Equipment Related Injuries in Underground U.S. Coal Mines
  10/1/2007 - Peer reviewed journal articles
  The top five priority hazards associated with underground coal mining equipment have been identified and information about potential contributing factors and controls collated.
• Development and Application of the Coal Mine Roof Rating (CMRR)
  5/1/2007 - Conference papers
  This paper discusses the sources used in developing the CMRR, describes the CMRR data collection and calculation procedures, and briefly presents a number of practical mining applications in which the CMRR has played a prominent role.
• Proceedings of the International Workshop on Rock Mass Classification in Underground Mining
  5/1/2007 - Information Circulars
  The goal of the workshop was to allow leading practitioners of rock mass classification to share their experiences with the technique. The proceedings contain 16 papers from 9 countries. Applications in both hard-rock and coal mining are represented.
• Detrimental Effects of Capacitance on High-Resistance-Grounded Mine Distribution Systems
  9/1/2006 - Peer reviewed journal articles
  There are potential detrimental effects of capacitance charging currents during line-to-ground faults in mine power distribution systems. A representative mine power system is modeled, and simulations with faults at various locations are conducted.
• Predicting Methane Emissions from Longer Longwall Faces by Analysis of Emission Contributors
  6/1/2006 - Conference papers
  NIOSH conducted a longwall methane emission and mining time study at a Pittsburgh Coalbed mine to predict emissions from a longer face, and developed and applied mathematical formulas and constants to characterize four emission contributors.
• CFD Modeling of Fire Spread Along Combustibles in a Mine Entry
  3/1/2006 - Conference papers
  A computational fluid dynamics (CFD) program was applied to fire spread along combustibles in a ventilated mine entry. The rate of flame spread was evaluated for the ribs and roof of a coal mine entry, timber sets, and a conveyor belt.
• Operationalizing Normal Accident Theory for Safety-Related Computer Systems
  11/1/2005 - Peer reviewed journal articles
  Normal Accident Theory is a classic argument in organizational sociology, although it has been criticized as having imprecise definitions and lacking criteria for quantifying complexity. These limitations are addressed by a unique approach.
• Analysis of Mine Fires for All U.S. Metal/Nonmetal Mining Categories, 1990-2001
  11/1/2004 - Information Circulars
  This report analyzes mine fires for all U.S. underground and surface metal/nonmetal mining categories during 1990-2001 by state and six successive 2-year time periods.