Research On The Coal Spontaneous Combustion Dangerous Area Division And Numerical Simulation In Huang Yanhui Mine Fully Mechanized Goaf

The coal seam spontaneous fire is a serious threat of mine safety in production in ourcountry. Which can cause gas and coal dust explosion，and major fatal accidents of casualties.The goaf float coal spontaneous combustion of the high gas mine is a problem we need tosolve, which directly affects the mine safety production of working face.The technology of fully mechanized caving coal face plays an important role to the mineachieve high production and efficiency. However, the low efficiency of mining upper coal hascaused two lines, two laneways legacy a large number of floating coal. The high gas minedrainages gas by using the high drainage way and gas emissions special lane to reduce the gasconcentration, which increases the air leakage and the coal spontaneous combustiondangerousness of the goaf. So, the key to prevent coal mine fire and exterminate it is toascertain the location of high temperature site.The paper, from the goaf float coal spontaneous combustion characteristics of fullymechanized gob under the condition of gas drainage, researched the flow field of the airleakage and the oxygen concentration distribution of the goaf by numerical simulation method,which was based on the15109workface of the Huang Yanhui mine. First, the article wasbased on the current mechanism and prediction and dangerous area determination of the coalspontaneous combustion, seepage flow mechanics and the research situation of numericalsimulation, which determined the relevant characteristic parameters of coal seam spontaneouscombustion by the experimental simulation, and established the gas seepage prediction modelof the fully mechanized gob under the condition of the high drainage way and gas emissionsspecial lane were worked, and calculated it by numerical simulation way. Second, researchingthe influence of the goaf Three Zone by changing the negative pressure value of the high drainage way. Finally, according to the actual observation dates, the article divided the staticalcoal spontaneous combustion dangerous area of the goaf, and confirmed reliability andaccuracy of the established mathematical model. The results of the study are important forguiding the same type mine to prevent coal self-ignition in goaf.