通风方式对采空区煤层自燃规律的影响研究

Study on Influence of Ventilation Mode on the Spontaneous Combustion Law of Coal Seam in Goaf

为了研究通风方式对采空区自燃规律的影响,本文在研究风流流动方程及能量损失源项方程的基础上,对采空区自燃区域建立二维物理模型,并采用数值模拟对4种不同通风方式的采空区风场进行模拟,得到不同通风方式下采空区氧气浓度分布图,通过分析得出,4种通风方式对采空区自燃影响程度由大到小依次为:Z型>Y型>U型>W型。

In order to study the influence of ventilation mode on the spontaneous combustion law of coal seam in goaf,on the basis of study of air flow equation and energy loss source term equation,this paper establishes a two-dimensional physical model for the spontaneous combustion area of goaf,and uses numerical simulation to simulate the 4 different ventilation modes of goaf,and obtains the distribution diagram of oxygen concentration in goaf under different ventilation modes. After analysis,the influence degree of different ventilation modes on spontaneous combustion of goaf is in the order of Z type>Y type>U type>W type.