煤矿专业英语翻译.docx

煤矿专业英语翻译

第一篇：煤矿专业英语翻译CoalSeamMethaneMethanegenerationMethane,carbondioxideandwateraregeneratedasby-productsofthecoalformationprocess.Theproportionsofeachgasproducedvaryduringtheprocess.Mostofthegasandwatermigratesawayfromtheseam.Howeversomegasisretainedwithinthecoalseam.Thecapacityofcoaltoretaincarbondioxideismuchgreaterthanformethane.However,thelargequantitiesofmethaneproducedduringtheformationofthehighrankbituminousandanthracitecoalsflushedmostofthecarbondioxideaway.ThebituminouscoalsoftheSydneyandBowenBasinstypicallycontaingasconsistingofover95percentmethanewithsmallerquantitiesofcarbondioxide,ethane,higherhydrocarbons,nitrogenandinertgases.Theseamsinsomeareasofthebasinscontainveryhighlevelsofcarbondioxide.Thiscarbondioxidewasintroducedlaterintothecoalmeasuresequencebyigneousactivityreplacingthemethanepreferentially.Therearethreemechanismsbywhichgasisstoredwithinthecoalseams.About90percentofthegasisabsorbedontothecoalsurfacewithinthematrixporestructure,theremainderexistsasfreegasinthenaturalfracture(cleat)systemsoftheseamsorisdissolvedwithintheseamwater.Gaswhichhasmigratedawayfromtheseamsisoftentrappedinthefracturesandporespaceswithintheroofandfloorrocks.Thecapacityofcoaltoholdgasisdependentonporositywhichinturnisrelatedtorank,gascompositionandgaspressure.Ageneralrelationshiphasbeenestablishedthatsorptivecapacity(andthereforepotentialtotalgascontent)increaseswithrankofthecoalandwithdepth.Permeabilityofcoaldecreaseswithdepth.coalmininghistoricallyhasbeenahazardousoccupationbut,inrecentyears,tremendousprogresshasbeenmadeinreducingaccidentalcoalminedeathsandinjuries.在历史上，煤矿开采一直是危险的行业。但是，在近几年中，人们在减少煤矿伤亡事故方面取得了巨大的进步。何宁Accidentpreventionfundamentalsarenodifferentforcoalminingthanforanyothertypeofwork.Thefundamentalsapplytoallindustries.Constructionworkersmaybestruckbyfallingtoolsandmaterials,andminersmaybestruckbyfallingslateandcoal.Sailorsmaybetrappedbyshipboardfires,andminersmaybetrappedbyminefires.Railroadbrakemenmaylosehandsandfingerspositioningcouplers,andminer