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Results 1 - 10 of 81
6/1/2010 - Conference papersThis 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 Mining9/1/2008 - Peer reviewed journal articlesThis 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 Networks2/1/2008 - Peer reviewed journal articlesThis 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.
7/1/2001 - Conference papersIn 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.
1/17/2020 - Research areasMethane 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.
Development of a Fault-Rupture Environment in 3D: A Numerical Tool for Examining the Mechanical Impact of a Fault on Underground Excavations2/1/2019 - Peer reviewed journal articlesAn 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 Overburden7/17/2018 - Peer reviewed journal articlesAn article describing the development of seismic forecast maps based on the geology of previous seismic locations.
4/9/2018 - Research projectsA project to develop strategies for identifying and managing geologic features that increase the risk of dynamic failures in underground coal deposits.
3/30/2017 - Research projectsA project to explore and refine advanced event detection, location, and magnitude estimation methods that can be used to increase seismic catalog quality.
11/5/2016 - Research projectsA project to establish a new standard for ground control safety in deep vein mines.