Results 21 - 30 of 52

• Earth Conductivity Estimation from Through-the-Earth Measurements of 94 Coal Mines Using Different Electromagnetic Models
  10/1/2014 - Peer reviewed journal articles
  An analyis of TTE measurement data collected from 94 mines in order to determine the apparent conductivity of the overburden based on three different models: a homogenous half-space model, a thin sheet model, and an attenuation factor or Q-factor model.
• Wireless Through-The-Earth Modeling and Support
  8/15/2014 - Contracts and cooperative agreements
  A contract to determine the factors that most affect signal transmission and reception for through-the-earth communication systems.
• Strengthening an Existing 20-PSI Mine Seal with PPG's Polyurea Coated Retrofit
  7/22/2014 - Contracts and cooperative agreements
  A contract to develop a spray-applied polyurea coating system that would upgrade existing 20-psi approved mine seals to withstand blast pressures greater than 60 psi.
• System Reliability and Environmental Survivability
  9/22/2012 - Contracts and cooperative agreements
  A contract to develop a practical methodology with appropriate technical guidelines that enables mine operators and enforcement agencies to evaluate the reliability of underground communications, tracking, and atmospheric monitoring systems.
• A Shell-Based Magnetic Field Model for Magnetic Proximity Detection Systems
  3/1/2012 - Peer reviewed journal articles
  This paper will present an analysis of the model along with a model construction process.
• From Development to Evaluating Effectiveness in Industry: Building a Research Model for Noise Control Technology Efforts
  4/1/2010 - Conference papers
  A research model was developed to include metrics to evaluate and measure the effectiveness of noise control technologies. This model can be used to assess the development, dissemination, and evaluation of noise control technologies.
• Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
  11/1/2009 - Conference papers
  This paper demonstrates the applications of coal bed reservoir engineering and modeling techniques for optimizing and controlling methane emissions in longwall and continuous miner sections.
• Modeling Methane Emissions and Ventilation Needs by Examination of Mining Induced Permeability Changes and Related Damage to Ventilation Controls
  6/1/2009 - Conference papers
  This paper aims to examine the effects of porosity and permeability changes of the coal seam on methane emissions in an underground continuous miner section.
• Understanding Mine Fire Disasters by Determining the Characteristics of Deep-Seated Fires
  2/1/2009 - Conference papers
  This paper describes the fire tests, provides insight into characteristics of flame spread, and presents the CFD modeling work results of tests to help determine the characteristics for deep-seated fires.
• An Expanded Model for Predicting Surface Coal Mine Drill Respirable Dust Emissions
  9/1/2008 - Peer reviewed journal articles
  The focus of this work is drill shroud dust leakage and the relationships of various drill parameters on this leakage.