Research Article

Study on Thermodynamic Characteristics and Heat Transfer Method of Uncontrolled Fire in Coal Mine Gangue Mountain Spontaneous Combustion Based on System Dynamics

Figure 5

Variation of coal pile temperature curve with time. The shaded part represents the critical temperature range of coal spontaneous combustion. 0∼300 h is without the hot rod stage, and 300∼600 h is with the hot rod stage.