Results 11 - 20 of 32

• Computational Fluid Dynamics Modeling for Underground Mines
  7/18/2016 - Contracts and cooperative agreements
  A capacity-building contract to expand on previous and existing work with computational fluid dynamics (CFD) modeling using the FLUENT code to develop a modeling and predictive tool for mine ventilation.
• Combustion Modeling and Spontaneous Combustion Prevention in Longwall Gobs
  7/18/2016 - Contracts and cooperative agreements
  A capacity-building contract to examine the explosion and fire hazards in the gobs of underground longwall coal mines through physical and numerical modeling.
• Safety Aspects of Mine Ventilation Through Technical Development and Training
  4/29/2016 - Contracts and cooperative agreements
  A capacity-building contract to investigate safety aspects of mine ventilation through technical development and training.
• Probabilistic Modeling Using Bivariate Normal Distributions for Identification of Flow and Displacement Intervals in Longwall Overburden
  1/1/2011 - Peer reviewed journal articles
  Gob gas ventholes capture methane emissions. This study used bivariate normal distributions to determine the conditional probabilities of depth-displacement, depth-flow percentage, depth-formation, and depth-gas content of the overburden formations.
• Reservoir Diagnosis of Longwall Gobs Through Drawdown Tests and Decline Curve Analyses of Gob Gas Venthole Productions
  7/1/2010 - Peer reviewed journal articles
  During longwall mining, fracturing and relaxation in the gob creates new and highly permeable flow paths. The production rate-pressure behavior of a gob gas venthole (GGV) drilled over a longwall panel was analyzed by using multi-rate drawdown and decl...
• A New Method to Calculate Permeability of Gob for Air Leakage Calculations and for Improvements in Methane Control
  6/1/2010 - Conference papers
  This study demonstrates a fractal approach to calculating permeability of gob for air leakage that allows the calculation of porosity and permeability from the size distribution of broken rock material in the gob, which can be determined from image anal...
• Prediction of Porosity and Permeability of Caved Zone in Longwall Gobs
  3/1/2010 - Peer reviewed journal articles
  This work presents a fractal porous medium model to predict gob porosity and permeability for controlling methane flow and to predict air leakage into the gob.
• A Methodology for Determining Gob Permeability Distributions and its Application to Reservoir Modeling of Coal Mine Longwalls
  2/1/2007 - Conference papers
  Methane can be a significant hazard in coal mine longwalling operations and extensive methane mitigation techniques are employed by coal mine operators. Reservoir modeling techniques are used to better understand the liberation and migration of methane ...
• Computational Fluid Dynamics Study on the Ventilation Flow Paths In Longwall Gobs
  6/1/2006 - Conference papers
  This paper focuses on the flow patterns within the gob under three different ventilation systems: one-entry and two-entry bleederless systems, as well as a three-entry bleeder system.
• Remote Gob Gas Venthole Monitoring and Cellular Telephone-Based Real-Time Data Transmission System
  10/1/2002 - Conference papers
  Report on the development and field testing of a solar powered, remote gob gas venthole monitoring and cellular telephone-based real-time data transmission system.