基于事故调查技术的天然气泄漏爆炸分析——以十堰“6·13”重大燃气爆炸事故为例  

Analysis of Natural Gas Explosion based on Accident Investigation Technique——Taking Shiyan“6·13”Major Gas Explosion Accident as Example

作　　者：李欣 乐有邦[3] 张刚 陈先锋 李毅[5] LI Xin;LE You-bang;ZHANG Gang;CHEN Xian-feng;LI Yi(Huangshi Fire Rescue Detachment,Huangshi 435000,China;Wuhan University of Technology,Wuhan 430070,China;Sinosteel Wuhan Safety&Environmental Protection Research Institute Co.,Ltd.,Wuhan 430080,China;Nanyang Explosion Proof Electric Research Institute,Nanyang 473000,China;Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]黄石市消防救援支队,黄石435000 [2]武汉理工大学,武汉430070 [3]中钢集团武汉安全环保研究院有限公司,武汉430080 [4]南阳防爆电气研究所有限公司,南阳473000 [5]南京理工大学,南京210094

出　　处：《爆破》2023年第3期39-45,共7页Blasting

基　　金：国家自然科学基金项目(52274224)。

摘　　要：以十堰“6·13”重大燃气爆炸事故为研究对象,构建了集现场勘查、走访与问询、数值计算、理论分析于一体的事故调查技术手段。现场勘查过程中发现,涉事集贸市场东南角下方河道内残存一段DN57 mm中压天然气管道。该天然气管道紧邻生活污水排水口,由于长期处于潮湿环境,管道锈蚀,局部穿孔破裂。同时结合视频资料、集贸市场周边居民的走访与问询,发现集贸市场东南角的河道内最先发现淡黄色的天然气烟雾。综合实地踏勘、人员问询与视频监控,集贸市场下方河道内东南角部位的DN57 mm中压天然气管道为泄漏点。此外,事故发生前,存在商户正进行相关动火活动,部分火星通过排油烟管道进入河道内,引燃积聚在河道内的预混可燃气,进而导致爆炸的发生。使用ANSYS/FLUENT数值计算软件,建立集贸市场下方河道数值模型,模拟获得河道内积聚的天然气体积为600 m^(3),其爆炸TNT当量为225 kg。该燃气体积与爆炸当量与事故调查公布数据一致,证明此分析方式的可行性。该研究涉及的相关事故调查手段可为同类事故的调查工作提供参考。Taking the“6·13”major gas explosion accident in Shiyan as the research object,this work constructed an accident investigation technique integrating scene investigation,interview and inquiry,numerical calculation and theoretical analysis.During the scene investigation,it was found that a section of DN57 mm medium pressure natural gas pipeline remained in the river below the southeast corner of the market.The pipe was adjacent to the domestic sewage drainage outlet,and it was rusted and partially ruptured due to the long-term wet environment.Meanwhile,yellowish natural gas fume was first found in the river at the southeast corner by video monitoring,visits and inquiries from surrounding residents,which led to the result that the aforementioned pipeline was the leak point.In addition,some merchants were engaged in flame operations before the accident.Some sparks entered the river through the smoke exhaust pipe and ignited the premixed combustible gas accumulated in the river,which resulted in the explosion.A numerical model of the river was established by the ANSYS/FLUENT software,and the volume of the natural gas accumulated in the riverway was 600 m^(3),which explosive TNT equivalent was 225 kg.The gas volume and explosion equivalent are consistent with the data published in the accident investigation,which proves the feasibility of this analysis method.

关 键 词：天然气泄漏 爆炸当量 数值模拟 超压 

分 类 号：TD235.3[矿业工程—矿井建设]