不同回采进度与煤质条件下采空区自燃“三带”划分

The division of spontaneous combustion "three zone" in goaf under different mining schedules and coal quality conditions

瓦斯抽放、煤层自燃等级高会增大采空区煤自燃的危险性,因此需要对采空区自燃"三带"进行划分。为了探究不同回采进度与煤质条件对采空区自燃"三带"分布的影响,红阳二矿分别对1203、1204、1301采煤工作面进行自燃"三带"划分。针对煤矿实际情况,使用束管和感温光纤分别监测采空区的氧气浓度与温度变化,从氧气浓度和温升两方面进行采空区自燃"三带"划分。测定得出回采进度以及煤质条件会在一定程度上影响采空区自燃"三带"的分布,因此在确定采空区防灭火措施时应充分考虑这两个影响因素。

Gas drainage and high level of coal seam spontaneous combustion will increase the risk of coal spontaneous combustion in goaf,thus it is necessary to divide the "three zones" of spontaneous combustion in goaf. In order to explore the influence of different mining schedules and coal quality conditions on the distribution of spontaneous combustion "three zone" in goaf, spontaneous combustion "three zone" for1203, 1204 and 1301 coal working faces of Hongyang no.2 coal mine have been divided. According to actual situation of coal mine, the oxygen concentration and temperature change in goaf are monitored by beam tube and temperature sensing fiber respectively, and the spontaneous combustion "three zone" in goaf are divided according to oxygen concentration and temperature rise. The results suggest that mining schedules and coal quality conditions will affect the distribution of spontaneous combustion "three zones" in goaf to a certain extent. Therefore, these two factors should be fully considered when determining the fire-fighting measures for goaf.