Study on numerical simulation about the dividon of spontanneous ignition“three bands”in operation goaf

Using upwind finite method with the technology of grapy display the artile, solves the leak air seepage and air movement diffusec equation and seepage dissipation equation of oxygen concentration variation process. Taking fully-mechanized top coal caving face as an example, it explains that the charater is unblance of the distribution of oxygen concentration acecording to goaf leakage air flow. It determines the goaf spontaneous combustion band combined high oxygen combustion area within regeneration area.It also discusses the numerical simulation result of spontaneous combustion band抯 varation under all kinds of boundaries. It offers a new way for analysis and comprehenssion of the early growing up process and influence factors of goaf spontaneous conbustion.