Research On Combustion State And Gasanalysis Of Sealed Fire Zone In Underground Coal Mine

At first, though carring on experiments to research the variation law of gases for coal spontaneouscombustion, based on these, the dissertation summaried the combustion state judgement indexes ofthe sealed fire zone. Secondly, it set up the mathematical model of inert gas injecting of the sealedfire zone in high-methane mine, gave the definite condition to solve it, and got the movementcondition of inert gas jet and the conclusion that the possibility of gas explosion is bigger. Itconsiders this kind of mine should be taken long-range fire sealing at the early stage of the fire.Thirdly, it researched on the gas detection equipments and analysis technology of gas explosive inthe sealed fire zone. Fourthly, it designed the square diagram, expounded its calculation andjudgement principle, came up with the detailed making steps of illustration, and verified its accuracyby an example. Finally, through a successful practical application, it proposed the technology ofincreasing oxygen observation to unseal fire zone and the method of determining the sealed fire zonecombustion state based on the change trend of gas concentration.