Simulition And Software Exploitation For Gas Seepage In Fissured Coal Based On Lattice Boltzmann Method

The gas seepage flow rules through fissured coal are the foundation of gas outburst and drainage in coal mine. However, gas seepage flow rules through fissured coal are so comp -licated that it is very difficult to study them accurately by traditional experimental and theore -tic means. Developing math models and numerical analysis methods becomes one of the main directions of study on gas flow mechanics through porous media. Lattice Boltzmann method is a kind of simplified numeration model based on microcosmic level, which is not based on discretizations of the macroscopic continuum equations, it sets up lattice gas model based on description of physics system mesoscopic motion from microcosmic model and mesoscopic kinetic equations. The characters of physics system are computed by the evolvement of lattice Boltzmann model, which founds the tie of macroscopic physics quantities and mesoscopic motion. The problem of gas seepage flow rules through fissured coal is explored elementarily, main progress includes the four parts:(1) On the summarizing previous studies foundation, the macroscopic control equations Navier-Stokes equations for mechanics in porous media flow are obtained from lattice Boltzmann model for incompressible flows through porous media.(2) Simulation software for gas seepage in fissured coal based on lattice Boltzmann methd (GS-LBM) is exploited by using Graphical User Interfaces (GUI) of MATLAB7.0,which can present the dynamic simulation course of gas seepage in fissured coal.(3) Using GS-LBM system, the gas drainage seepage rules through fissured coal are simulated, the directive conclusion what are the effects of gas drainage pressure the single pore aperture the pore position and symmetrical two pores position on gas drainage purpose.