WANG Wencai，YANG Shaochen，WANG Dawei，WANG Peng，WU Zhoukang，LI Qiangqiang
（Mining and Coal School，Inner Mongolia University of Science and Technology，Baotou 014010，China）
Abstract：In order to prevent spontaneous combustion of coal gangue mountain，the distribution of seepage field inside coal gangue mountain was studied by using Fluent numerical simulation. Based on the theory of “Three Zones”of spontaneous combustion in goaf， the three zones of spontaneous combustion in coal gangue mountain are divided and its distribution law is defined in order to provide help for the prevention and treatment of spontaneous combustion in coal gangue mountain. The results show that the air seepage velocity is higher on the slope of coal gangue and decreases rapidly with the increase of the depth from the slope . The coal gangue scattering zone is located near and at the foot of the slope . The asphyxiation zone is located at the the top of the slope and deep in the gangue mountain . The oxidation zone is located in the range of 5 . 8 ~ 14 . 9 meters from the bottom of the coal gangue hill in the shape of fusi- form . The outer surface of the oxidation zone is 1 . 1 ~ 1 . 4 meters away from the slope of the coal gangue mountain，and the inner sur- face is 3 . 1 ~ 10 . 2 meters away from the slope of the coal gangue mountain.
Key words：coal gangue mountain；“Three Zones”of spontaneous combustion；air seepage field；oxygen concentration field