Results 1 - 10 of 79

• Composition Change Model for Sealed Atmosphere in Coal Mines
  6/1/2010 - Conference papers
  This paper presents a mathematical model based on the conservation of mass principle describing the flow of air (nitrogen and oxygen), methane, and carbon dioxide into and out of a sealed atmosphere and time-dependent changes in gas concentration.
• A Numerical Evaluation on the Effects of Impermeable Faults on Degasification Efficiency and Methane Emissions During Underground Coal Mining
  9/1/2008 - Peer reviewed journal articles
  This study uses reservoir simulations to illustrate the effects of impermeable faults on the production performance of vertical and horizontal degasification boreholes.
• Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
  2/1/2008 - Peer reviewed journal articles
  This study proposes a principal component analysis (PCA) and artificial neural network (ANN)-based approach to predict the ventilation methane emission rates of U.S. longwall mines.
• Three Dimensional Microseismic Monitoring of a Utah Longwall
  7/1/2001 - Conference papers
  In Utah, 3-D, full waveform, autonomous microseismic arrays were placed underground and on the surface of a longwall coal mine with overburden exceeding 750 m. Overall 13,000 seismic events, including a magnitude 4.2 event, were detected and located.
• Geologic Parameters for Identifying Areas of Increased Methane and Mining-induced Seismicity at Deep Coal Mines
  1/16/2024 - Research projects
  A pilot project to determine the geological variables linked to high methane concentrations and increased mining-induced seismicity in underground coal mines.
• Geologic Characterization
  3/16/2021 - Research areas
  Geologic Characterization Topic Page
• Methane Drainage and Migration
  2/18/2021 - Research areas
  Methane is an odorless, tasteless, colorless, lighter-than-air gas formed by the decomposition of organic and other carbonaceous materials. From 5% to 15% can form an explosive mixture which, if ignited, can have catastrophic consequences.
• Detecting and Managing Dynamic Failure of Near-Seam Features in Coal and Nonmetal Mines
  9/16/2020 - Research projects
  A project to develop strategies for identifying and managing geologic features that increase the risk of dynamic failures in underground coal deposits.
• Development of a Fault-Rupture Environment in 3D: A Numerical Tool for Examining the Mechanical Impact of a Fault on Underground Excavations
  2/1/2019 - Peer reviewed journal articles
  An article assessing whether a numerical tool might be useful or practical in forecasting bump potential associated with a strike-slip fault for a typical structural geologic setting.
• Evaluation of Seismic Potential in a Longwall Mine with Massive Sandstone Roof Under Deep Overburden
  7/17/2018 - Peer reviewed journal articles
  An article describing the development of seismic forecast maps based on the geology of previous seismic locations.