Abstract:  In view of sulfide ore stacking in a copper mine，the safety problem on spontaneous combustion of sulfide ore stack should be solved. Considering the two heating modes of oxidation heat and adiabatic temperature rise of sulfide ore in the deposits，and with use of ANSYS，the temperature field models for two kinds of deposits are established，that is triangle near the side wall and trapezoid on flat foundation，which are commonly used in mines，to study the variation of temperature field and spontaneous combustion zone with time in the same volume of sulfide ore stack under two kinds of deposit modes. Through the calculation and simulation，the temperature field and the spontaneous combustion area distribution map at different time inside the deposit are obtained. The results show that the prevention and control measures should be taken before the daily temperature rise of 6 ℃. The shape of ore heap with larger surface area under the same volume has slower internal temperature rise and shorter spontaneous combustion time. According to the research results，the trapezoidal stacking mode and its related prevention measures are recommended.

Key words: Spontaneous combustion, Temperature field, Heating curve, Spontaneous combustion area