Analysis on Seepage Features in Goaf and Numerical Simulation Prediction of Flow Field
Abstract：In order to solve the spontaneous combustion firing in the goaf of the spontaneous combustion and high gassy seam and the upper corner gas over limits problems occurred by the high gas emission quantity,in combination with the O ring theory,the seepage features of the goaf was analyzed.With the introduction of the Ergum single phase current semi-experience nonlinear seepage formula,in combination with the continuity equation,the momentum equation and the gas dynamic dispersion equation,a seepage model of the flow field in the goaf was established.With the Fluent software,in combination with the certain cases,the air flow velocity field and the gas density field in the goaf was simulated,predicted and analyzed.The simulation results showed that according to the O ring theory and the seepage model,the simulation results of the Fluent software could meet the actual conditions with related measures set up the safety hidden peril could be eliminated in advance.
Keywords：goafseepage featuresporous mediumO ring theoryErgun formulanumerical simulationgas control
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)