Results 31 - 40 of 52

• Evaluation of the Relative Importance of Coalbed Reservoir Parameters for Prediction of Methane Inflow Rates During Mining of Longwall Development Entries
  9/1/2008 - Peer reviewed journal articles
  This study presents a reservoir modeling approach to investigate the relative effects of different coalbed parameters on the migration of methane into development entries, and shows that this technique can be applicable to different coalbeds.
• Reservoir Modeling-Based Prediction and Optimization of Ventilation Requirements During Development Mining in Underground Coal Mines
  2/1/2008 - Conference papers
  This NIOSH study presents an approach for prediction of methane inflow rates using coalbed methane reservoir modeling which can be used to limit the methane concentrations occurring as a result of the influences of various coalbed and operational parame...
• Reservoir Simulation-Based Modeling for Characterizing Longwall Methane Emissions and Gob Gas Venthole Production
  7/1/2007 - Peer reviewed journal articles
  This paper presents the development and results of a comprehensive, "dynamic," three-dimensional reservoir model of a typical multi-panel Pittsburgh coalbed longwall mine. Results presented in this paper include a simulation of gas flow patterns from th...
• 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 ...
• Development of Ground Response Curves for Longwall Tailgate Support Design
  6/1/2006 - Conference papers
  This paper presents the results of a study into the ground response around tailgate entries using numerical models. The potential exists to develop site-specific tailgate design curves by combining model results with field observations.
• Experimental and Modeling Investigation of the Effect of Ventilation on Smoke Rollback in a Mine Entry
  1/1/2006 - Peer reviewed journal articles
  Results of diesel fuel fire experiments were conducted to determine the critical air velocity for preventing smoke rollback. Experimental results compared well with model predictions based on a computational fluid dynamics fire dynamics simulator.
• Significant Dust Dispersion Models for Mining Operations
  9/1/2005 - Information Circulars
  This report presents the various dust dispersion models that have been developed specifically for the mining industry.
• Experimental and Modeling Investigation of the Effect of Ventilation on Smoke Rollback in a Mine Entry
  2/1/2005 - Conference papers
  Diesel fuel fire experiments were conducted to determine the critical air velocity for preventing smoke rollback. Experimental results compared very well with model predictions based upon a computational fluid dynamics (CFD) fire dynamics simulator.
• UDEC Modeling of an Underground Opening in a Rock Mass of Varying Quality
  5/1/2004 - Conference papers
  This paper describes a project involving modeling rock masses with varying Rock Mass Rating (RMR) values to determine the degree of instability that develops around an underground opening as a function of RMR.
• The Effect of Standing Support Stiffness on Primary and Secondary Bolting Systems
  8/1/2003 - Conference papers
  Standing crib supports have been applied in underground mining programs to resist large roof movements and sustain high-loads. The parameter that has not been examined and is not well understood is the effect that a crib or other types of standing supp...