大气压变化对矿井封闭区域气体采样的影响  

Influence of atmospheric pressure change on gas sampling in mine closed area

作　　者：雷柏伟[1] 杜珮颖 肖博文 吴兵[1] Lei Baiwei;Du Peiying;Xiao Bowen;Wu Bing(School of Emergency Management and Safety Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)应急管理与安全工程学院,北京100083

出　　处：《矿业科学学报》2020年第3期257-262,共6页Journal of Mining Science and Technology

基　　金：国家重点研发计划(2018YFC0808100)。

摘　　要：大气压波动变化会引起矿井封闭区域与外界环境的风量交换,进而对矿井封闭区域的气体运移产生影响。为了研究地面大气压变化对矿井封闭区域气体采样的影响,以大同地区2017-2018年逐时大气压数据为基础进行统计分析,确定了大气压周期性变化规律、波峰波谷分布时刻及封闭区域漏风量的变化规律。研究结果表明:大气压变化有年周期性,但日周期性较差,且其对封闭区域与外界环境的风量交换影响较大。因此,为有效分析封闭区域内的真实气体状态,应优先使用束管系统对封闭区域进行连续取样监测分析,且同时需要根据封闭区域具体参数并结合当地大气压逐时变化规律确定埋管深度,以便消除外界环境漏风对封闭区域内气体稀释的影响。The variation of atmospheric pressure will cause the exchange of air volume between the closed area of the mine and the external environment,which will have an impact on the gas migration in the closed area of the mine.In order to study the influence of the change of surface atmospheric pressure on the gas sampling in the closed area of the mine,a statistical analysis was carried out based on the hourly atmospheric pressure data from 2017 to 2018 in Datong area,and the periodic change rule of atmospheric pressure,the distribution time of the peak and trough of the wave and the change rule of the leakage air volume in the closed area were determined.The results show that the variation of atmospheric pressure has annual periodicity,but the daily periodicity is poor,and it has a great influence on the air volume exchange between the closed area and the external environment.Therefore,in order to effectively analyze the closed area of the real gas state,priority should be given to the use of tube system for continuous sampling monitoring analysis of closed area.At the same time,the buried pipe depth should be determined according to the specific parameters of the clozed area and the hourly variation law of local atmospheric pressure,so as to eliminate the influence of air leakage from the external environment on the dilution of gas in the clozed area.

关 键 词：封闭区域 大气压 逐时变化 漏风 周期性 

分 类 号：TD713[矿业工程—矿井通风与安全]