LeiBaiwei, DuPeiying, XiaoBowen, WuBing. Influence of atmospheric pressure change on gas sampling in mine closed area[J]. Journal of Mining Science and Technology, 2020, 5(3): 257-262.
Citation:
LeiBaiwei, DuPeiying, XiaoBowen, WuBing. Influence of atmospheric pressure change on gas sampling in mine closed area[J]. Journal of Mining Science and Technology, 2020, 5(3): 257-262.
LeiBaiwei, DuPeiying, XiaoBowen, WuBing. Influence of atmospheric pressure change on gas sampling in mine closed area[J]. Journal of Mining Science and Technology, 2020, 5(3): 257-262.
Citation:
LeiBaiwei, DuPeiying, XiaoBowen, WuBing. Influence of atmospheric pressure change on gas sampling in mine closed area[J]. Journal of Mining Science and Technology, 2020, 5(3): 257-262.
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.
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