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1、原文Controlandpreventionofgasoutburstsincoalmines,Riosa-Olloniegocoalfield,SpainMariaB.DiazAguadoC.GonzalezNiciezaAbstractUndergroundcoalmineshavealwayshadtocontrolthepresenceofdifferentgasesintheminingenvironment.Amongthesegases,methaneisthemostimportantone,sinceitisinherentt
2、ocoal.Despiteofthetechnicaldevelopmentsinrecentdecades,methanehazardshavenotyetbeenfullyavoided・Thisispartlyduetotheincreasingdepthsofmodemmines,wheremethaneemissionsarehigher,andalsotoothermining-relatedcircumstances,suchastheincreaseinproductionratesanditsconsequences:diff
3、icultiesincontrollingtheincreasingmethanelevels,increasingmechanization,theuseofexplosivesandnotpayingcloseattentiontomethanecontrolsystems.Themainpurposesofthispaperaretoestablishsitemeasurementsusingsomecriticalparametersthatarcnotpartofthestandardmining-controlmethodsforr
4、iskassessmentandtoanalyzethegasbehaviorofsubverticalcoalseamsindeepminesinordertopreventgasincidentsfromoccurring.Theultimategoalistheimprovementinminingconditionsandthereforeinsafetyconditions・Forthispurpose,twodifferentmineswereinstrumentedforminecontrolandmonitoring.Bothm
5、inesbelongtotheRiosa-Olloniegocoalfield,intheAsturiasCentralBasin,Spainandtheareasinstrumentedarcminedviasubhorizontalsublevelsatanactualdepthofaround1000mundertheoverburdenofMountLusorio.Duringthisresearch,apropertyfavoringgasoutburstswassitemeasuredforthefirsttimeinanoutbu
6、rst-pronecoal(SthCoalbed),gaspressureanditsvariations,whichcontributedtocompletethedataavailablefrompreviouscharacterizationsandtosetsomeguidelinesforassessingthepotentialoutburst-proneareas.Agas-mcasurcmcnt-tubcsethasbeendesignedformeasuringgaspressureaswellasitsvariationov
7、ertimeasaresultofnearbyworkingsandtocalculatepermeability.Thepaperestablishestheeffectofoverlappingofworks,butitalsoshowstheefficacyoftwopreventivemeasurestobeapplied:highpressurewaterinfusionandtheexploitationofaprotectivecoalseam(7thCoalbed),thatmustbeminedpreferablytwocom
8、pletesublevelsbeforecommencingtheadvanceintheoutburst-pronecoalbed・Bothmeas
