The Study On Gas Explosion Wave Propagation Law And Affected Factors In Mine

The dissertation is on the basis of gaseous explosion theory in tubular space, analysis propagation law of gas explosion in mine roadways. The dissertation study is made up of three parts —theory analysis, numerical simulation and experimental text.Firstly, on the basis of studying physical mechanism of gas explosion in the mine, physical model of gas explosion spreading in the mine is built up.Secondly, on the case of existence of barricades, numerical simulation is made for analyzing the process of gas explosion propagation in the mine roadways. The results of numerical simulation barricades not only have excitation effect in the combustion section, but also exist in the explosion wave propagation.Thirdly, in the part of experimental study, there are testing and verifying the research results of the theory analysis and numerical simulation on the conclusion of gas explosion propagation process and testifying the existence of barricades excitation effect. In the meantime, the concentration of the combustible gas and the number and distributive location of fire source have influence on the gas explosion propagation seriously. The experiment study shows the gas explosion propagation exist the scale effect.The research results in this dissertation offer the important theoretical and technical support for the prevention control and cure and investigation of gas explosion accidents. The research result in this dissertation will contribute to developing of gas explosion dynamics.The National Natural Scientific Foundation Project — "The base theory and ways of mine fire accident and explosion investigation", supports the dissertation.