注氮对封闭火区燃烧状态及爆炸影响分析研究  

Analysis and research on the influence of nitrogen injection on the combustion state and explosion of a closed fire

作　　者：王南 WANG Nan(The Ventilation Office of Shanxi Lu’an Mining Group Co.,Ltd.,Changzhi Shanxi 046299,China)

机构地区：[1]山西潞安矿业(集团)有限责任公司通风处,山西长治046200

出　　处：《山西化工》2021年第1期123-125,共3页Shanxi Chemical Industry

摘　　要：为了得到注氮对封闭火区燃烧状态及爆炸作用效果,以五阳煤矿为研究对象,通过单一指标气体浓度变化速率和碳的氧化物比率,判定注氮后封闭火区燃烧状态及爆炸性,结果表明:采用措施后,CH_(4)浓度前期增高后期降低,CO、CO_(2)气体浓度从火区封闭开始9d后就一直呈现下降趋势,RO_(2)值从-0.0914变化为-0.0251,O_(2)浓度降低到1%以下;火区封闭14d后氧气浓度持续低于9%,低于可爆氧气浓度下限,研究成果对五阳煤矿火区的火灾与爆炸防控具有一定指导意义。In order to obtain the effect of nitrogen injection on the combustion state and explosion effect of the enclosed fire area,Wuyang Coal Mine was used as the research object,and the combustion state and explosiveness of the enclosed fire area after nitrogen injection were determined through the single index gas concentration change rate and the carbon oxide ratio.It shows that:after the measures are adopted,the concentration of CH_(4) increased in the early stage and decreased in the later stage.The concentration of CO and CO_(2) gas has shown a downward trend after 9 days after the fire zone was closed.The RO_(2) value changed from-0.0914 to-0.0251,and the O_(2) concentration decreased to below 1%;After the zone was closed for 14 days,the oxygen concentration continued to fall below 9%,which was below the lower limit of the explosive oxygen concentration.The research results have certain guiding significance for the fire and explosion prevention and control of the Wuyang Coal Mine.

关 键 词：注氮 封闭火区 燃烧状态 爆炸 

分 类 号：TD75[矿业工程—矿井通风与安全]