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。
Abstract:
The variation of atmospheric pressure will cause the exchange of air volume between the closedareaofthemineandtheexternalenvironment,whichwillhaveanimpactonthegasmigrationin theclosedareaofthemine.Inordertostudytheinfluenceofthechangeofsurfaceatmosphericpressure onthegassamplingintheclosedareaofthemine,astatisticalanalysiswascarriedoutbasedonthe hourlyatmosphericpressuredatafrom2017to2018inDatongarea,andtheperiodicchangeruleofatmosphericpressure,thedistributiontimeofthepeakandtroughofthewaveandthechangeruleofthe leakage air volume in the closed area were determined.The results show that the variation of atmosphericpressure has annual periodicity,but the daily periodicity is poor,and it has a great influenceontheairvolumeexchangebetweentheclosedareaandtheexternalenvironment.Therefore, inordertoeffectivelyanalyzetheclosedareaoftherealgasstate,priorityshouldbegiventotheuseof tubesystemforcontinuoussamplingmonitoringanalysisofclosedarea.Atthesametime,theburied pipedepthshouldbedeterminedaccordingtothespecificparametersoftheclozedareaandthehourly variationlawoflocalatmosphericpressure,soastoeliminatetheinfluenceofairleakagefromtheexternalenvironmentonthedilutionofgasintheclozedarea.
点击查看大图
下载: