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1、附录A：英文翻译（原文）StatusofworldwidecoalminemethaneemissionsanduseAbstract:Undergroundcoalminesworldwideliberateanestimated2971x10mofmethaneannually,ofwhichlessthan2.3x109m3areusedasfuel.Theremainingmethaneisemittedtotheatmosphere,representingthelossofavaluableenerg
2、yresource・Methaneisalsoamajorgreenhousegasandisthusdetrimentaltotheenvironmentwhenventedtotheatmosphere・Coalminemethanerecoveryanduserepresentsacost-effectivemeansofsignificantlyreducingmethaneemissionsfromcoalmining,whileincreasingminesafetyandimprovingminee
3、conomics.Theworld'stenlargestcoalproducersareresponsiblefor90%ofglobalmethaneemissionsassociatedwiththecoalfuelcycle・Chinaisthelargestemitterofcoalminemethane,followedbytheCommonwealthofIndependentStates,orCISparticukirlyRussia,UkraineandKazakhstan，theUnitedS
4、tates,Poland,Germany,SouthAfrica,theUnitedKingdom,Australia,IndiaandtheCzechRepublic・Mostofthesecountriesuseaportionofthemethanethatisliberatedfromtheircoalmines,buttheutilizationratetendstobelowandsomecountriesusenoneatall.Coalminemethaneiscurrentlyusedforav
5、arietyofpurposes・Methaneisusedforheatingandcookingatmanyminefacilitiesandnearbyresidences.Itisalsousedtofuelboilers,togenerateelectricity,directlyheatairformineventilationsystemsandforcoaldrying.SeveralminesintheUnitedStatessellhigh-qualityminegastonaturalgas
6、distributors・Thereareseveralbarrierstodecreasingmethaneemissionsbyincreasingcoalminemethaneuse・Manyofthesamebamersarecommontoanumberofthesubjectcountries・Technicalbeirriersincludelow-pcrmcabilitycoals;variableorlowgasquality,variationsingassupplyandemandandla
7、ckofinfrastructure・Economicandinstitutionalbarriersincludelackofinfonnationpertinenttodevelopmentoftheresource,lackofcapitalandlownaturalgasprices・Apossibleoptionforencouragingcoalminemethanerecoveryandusewouldbeinternationaladoptionofatraceablepermitsystemfo
8、rmethaneemissions.Keywords:coalbedmethane;globalwarming;coalmining;naturalgas1IntroductionInrecentyears,coalbedmethanehasgainedattentionasasaleablenaturalgasresource.Methanecanbeextracted
