采空区自燃发火CO蔓延规律仿真研究
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摘要
为探明采空区煤自燃发火温度、CO的分布规律;采用PyroSim火灾仿真软件,分别构建火源位置、风速不同的6种工况的采空区模型,进行数值模拟,比较各工况下温度、CO的分布、蔓延规律;研究发现:采空区煤自燃发火时温度的分布与火源位置及风速关系不大;CO的蔓延与火源位置及风速有关,当火源位于采空区中间时,CO向火源上侧蔓延,火源位于采空区左侧时,CO向火源左侧蔓延,风速越大CO越聚集;当不知火源位置时,若需要对CO钻孔导流,则钻孔的位置最好在采空区的左侧及上侧。
In order to find out the spread law of temperature and CO in goaf. The PyroSim fire simulation software was used to construct the goaf model with six different operating conditions.Compare the temperature and CO distribution and spread law. The study finds that the distribution of temperature in goaf has little related to different of the fire source and the wind speed. The spread of CO is related to different of the fire source and the wind speed. When the fire source is located middle in goaf, the CO spreads to the upper side of the fire source. When the fire source is located left in goaf,the CO spreads to the left side of the fire source, and the wind speed increases, CO more gathered.When it is not known where the fire source is located, if it is necessary to divert the CO, the holes are preferably drilled on the left side and the upper side of the goaf.
In order to find out the spread law of temperature and CO in goaf. The PyroSim fire simulation software was used to construct the goaf model with six different operating conditions.Compare the temperature and CO distribution and spread law. The study finds that the distribution of temperature in goaf has little related to different of the fire source and the wind speed. The spread of CO is related to different of the fire source and the wind speed. When the fire source is located middle in goaf, the CO spreads to the upper side of the fire source. When the fire source is located left in goaf,the CO spreads to the left side of the fire source, and the wind speed increases, CO more gathered.When it is not known where the fire source is located, if it is necessary to divert the CO, the holes are preferably drilled on the left side and the upper side of the goaf.
引文
[1]李宗翔,刘剑,马云东.采空区自燃火灾气体钻孔导流的数值模拟研究[J].中国安全科学学报,2004(4):107-110.
[2]关万里.神东矿区采空区遗煤自然发火规律研究[J].煤炭科学技术,2015,43(S2):71-75.
[3]秦跃平,刘伟,杨小彬,等.基于非达西渗流的采空区自然发火数值模拟[J].煤炭学报,2012,37(7):1177-1183.
[4]马步才.采空区自然发火定量预报及CO超限防治研究[D].北京:中国矿业大学,2016.
[5]田水承,张成镇.聚集用火下热探测器响应温度的研究[J].中国安全生产科学技术,2018,14(2):52-57.
[6]张娇,王筱冬.基于Pyrosim和Pathfinder的采区避难硐室设置研究[J].煤矿机械,2018,39(2):139-141.
[2]关万里.神东矿区采空区遗煤自然发火规律研究[J].煤炭科学技术,2015,43(S2):71-75.
[3]秦跃平,刘伟,杨小彬,等.基于非达西渗流的采空区自然发火数值模拟[J].煤炭学报,2012,37(7):1177-1183.
[4]马步才.采空区自然发火定量预报及CO超限防治研究[D].北京:中国矿业大学,2016.
[5]田水承,张成镇.聚集用火下热探测器响应温度的研究[J].中国安全生产科学技术,2018,14(2):52-57.
[6]张娇,王筱冬.基于Pyrosim和Pathfinder的采区避难硐室设置研究[J].煤矿机械,2018,39(2):139-141.