Y型通风下采空区自燃CO蔓延规律仿真研究
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摘要
为探明Y型通风下采空区煤自燃发火温度、CO的分布规律;采用Pyro Sim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向回风巷侧蔓延,火源位于采空区左侧时,CO向回采工作面蔓延,风速越大CO越容易蔓延至工作面;当不知火源位置时,若需要对CO钻孔导流,则孔钻的位置最好靠近采区工作面。
In order to find out the spread law of temperature and CO in goaf under Y-ventilation.the Pyro Sim in fire simulation software was used to construct the goaf model with six different operating conditions.Compared with the temperature and CO distribution and spread law,we have found that the distribution of temperature in goaf which 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.The spread of CO is related to the location of the fire source and the wind speed.When the fire source is located in the middle of the goaf,CO will spread to the side of the return wind lane.When the fire source is located on the left side of the goaf,CO will spread to the working face.The higher the wind speed,the easier it is for the CO to spread to the working face.When it is not known where the fire source is located,it is necessary to divert the CO hole.The position of the hole drill is preferably close to the working face.
In order to find out the spread law of temperature and CO in goaf under Y-ventilation.the Pyro Sim in fire simulation software was used to construct the goaf model with six different operating conditions.Compared with the temperature and CO distribution and spread law,we have found that the distribution of temperature in goaf which 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.The spread of CO is related to the location of the fire source and the wind speed.When the fire source is located in the middle of the goaf,CO will spread to the side of the return wind lane.When the fire source is located on the left side of the goaf,CO will spread to the working face.The higher the wind speed,the easier it is for the CO to spread to the working face.When it is not known where the fire source is located,it is necessary to divert the CO hole.The position of the hole drill is preferably close to the working face.
引文
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[3]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(11):71-75.
[4]刘伟,秦跃平,郝永江,等.Y型通风下采空区自燃发火数值模拟[J].辽宁工程技术大学学报,2013,32(7):874-879.
[5]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.
[6]Kevin M.Fire dynamics simulator(version 5)technical reference guide[M].NIST Special Publication,2001:1-3.
[7]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.
[8]张娇,王筱冬.掘进巷道火灾人员应急疏散数值模拟研究[J].中国锰业,2018,36(1):108-111.
[9]田水承,张成镇.古建筑用火源感温探测器响应温度研究[J].消防科学与技术,2017,36(11):1554-1557.