关键词: 采空区, 三带, 数值模拟, 氧浓度分布

Abstract: Flow mathematical model of fully mechanized minedout area flow field was set up by using seepage theory in porous media, take 2304 working face of Wangtaipu coal mine at Jincheng of Shanxi province as the example,numerical simulation was done on its minedout area flow field using FLUENT software, distribution of oxygen density and velocity  were obtained, oxygen concentration distributing graph was clear overlapped with velocity profile,pick public sector, spontaneous combustion oxidation zone was obtained. Meanwhile, scope observation of "three zones" of minedout area was carried out on 2304 working face. Numerical simulation result was verified by the scope doservation, and it proved established mathematilal model is correct, simulation results provide guidence for fireprevention and firefighting work of mine.

Key words: Minedout area, Three zones, Numerical simulation, Distribution of oxygen density