| Taking theory analysis, similar experiment and numerical simulation, themigration and diffusion regularities of gas abnormal emission and then migrated anddiffused along the roadway and its influential regions were researched systemly. Baseon the abstracting and summarizing the literatures on the subject the gas migrationand diffusion math model was built. Turbulenc diffusion model was built on the basisof hydronamics and Fick’s law. The similar simulation experiment system of themigration and diffusion regularities of gas abnormal emission was built and the majorparameters were confirmed. It concluded that the regularitiess of gas migration anddiffusion conform to negative exponential function. The regularities of gas migrationand diffusion experiment by the similar experiment are uniform with the fittingregularities of turbulence diffusion math model. The roadway was divided into threeregions namely, explosion threat region, explosion danger region and safety region,according to gas explosion range and regularities of gas migration and diffusion.Thesimulation results by using FLUENT match well with the simular experiment results.The achievement of eletromechanial equipment safety setting region offer the theoriesand technologies support for safety mining. |
