摘要: 通过对自燃煤矸石山内部烟气的平衡浓度(ψ)与温度(T)、压力比(p/pθ)、水-空比(α)之间关系的热力学模拟,得到了自燃煤矸石山发生爆炸的热力学条件.当α=100,p/pθ=100,T=800~1 200 K时,煤矸石燃烧烟气中CO,CO2,H2,CH4和水蒸气的平衡浓度分别为:0.002~0.422,0.034~0.170,0.049~0.126,0.005~0.355和0.004~0.904,CO,H2,CH4爆炸性气体可发生化学爆炸.当α=100,p/pθ=100,T=1 200~1 800 K时,煤矸石燃烧烟气中CO,CO2,H2,CH4和水蒸气的平衡浓度分别为:3.8×10-5~0.002,0.004~0.034,0.003~0.055,0~0.005和0.904~0.993,"烟气"中主要是高温高压水蒸气,可发生物理爆炸.