In order to study the effects of nitrogen-injection on the distribution of three zones of spontaneous combustion in goaf ,a physical model of seepage field in goaf with nitrogen-injection is established and the flow field in goaf is simulated . The three zones of spontaneous combustion in goaf are affected by the amount of nitrogen-injection .The results show that the heat dissipation zone is widened and the oxidation zone is moved to the deeper region in goaf when the amount of nitrogen-injection is enhanced .The influence of the amount of nitrogen-injection on oxygen concentration in the face is also ana-lyzed .%为研究注氮对采空区自燃三带分布的影响 ,建立了二维注氮采空区渗流场的数学模型 ,研究了注氮量的变化对采空区流场分布的影响 ,得到了注氮采空区自燃三带的分布规律.结果表明 ,随着注氮量的增大 ,散热带增宽 ,氧化带向采空区深部移动 ,距注氮源越近三带所受影响越大 ,并分析了注氮量对工作面氧浓度分布的影响.
展开▼
