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外文翻译--21世纪前半叶矿井提升机在深井中的应用.doc

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外文翻译--21世纪前半叶矿井提升机在深井中的应用.doc

英文原文MINEHOISTINGINDEEPSHAFTSINTHE1STHALFOF21STCENTURYALFREDCARBOGNO1KEYWORDSDEEPSHAFT,MINEHOSTING,BLAIRWINDER,ROPESAFETYFACTOR,DRUMSIZING,SKIPFACTORINTRODUCTIONTHEMINERALDEPOSITSAREEXPLOITEDONDEEPERANDDEEPERLEVELSINCONNECTIONWITHTHIS,DEFINITIONSLIKE“DEEPLEVEL”AND“DEEPSHAFT”BECAMEMOREANDMOREPOPULARTHESEDEFINITIONSCONCERNTHEDEPTHWHERESPECIALRULESREGARDINGANEXCAVATIONDRIVING,EXPLOITATION,ROCKPRESSURECONTROL,LININGCONSTRUCTION,VENTILATION,UNDERGROUNDANDVERTICALTRANSPORT,WORKORGANIZATIONANDECONOMICSAPPLYITHASPOINTEDOUTTHATTHE“DEEPLEVEL”ISAVERYRELATIVEDEFINITIONANDSHOULDBEUSEDONLYWITHAREFERENCETOPARTICULARHYDROGEOLOGICAL,MININGANDTECHNICALCONDITIONSINAMINEORCOALFIELDITSHOULDBEALSOSTRICTLYDEFINEDWHATAREAOF“DEEPLEVEL”OR“DEEPSHAFT”DEFINITIONSARECONSIDEREDITCANBEFOREXAMPLEMININGGEOENGINEERING,TECHNOLOGYOFEXCAVATIONDRIVING,VENTILATIONTEMPERATUREITISOBVIOUSTHATTHE“DEEPLEVEL”DEFINEDFROMONEPOINTOFVIEW,NOTNECESSARILYMEANSA“DEEPLEVEL”INANOTHERAREAACCORDINGTO5ASADEEPMINEWECANTREATEACHMINEIFTHEDEPTHISHIGHERTHAN2300MORMINERALDEPOSITTEMPERATUREISHIGHERTHAN38CITISWELLKNOWNTHATTHEMOSTOFDEEPMINESAREINSOUTHAFRICAUSUALLY,THEYAREGOLDORDIAMONDSMINESECONOMICDEPOSITSOFGOLDBEARINGOREAREKNOWNTOEXISTATDEPTHSUPTO5000MINANUMBEROFSOUTHAFRICAREGIONSHOWEVER,DUETOTHEDEPTHANDSTRUCTUREOFTHEREEFINSOMEAREAS,PREVIOUSMETHODSOFREACHINGDEEPERREEFSUSINGSUBVERTICALSHAFTSYSTEMSWOULDNOTBEECONOMICALLYVIABLETHUS,THELOCALMININGINDUSTRYISACTIVELYINVESTIGATINGNEWTECHNIQUESFORASINGLELIFTSHAFTUPTO3500MDEEPINTHENEARFUTUREANDPROBABLYAROUND5000MAFTERWARDSWHENCOMPAREDWITHTHEMAXIMUMLENGTHOFWINDCURRENTLYINOPERATIONOF2500M,ITISAPPARENTTHATSOMESIGNIFICANTINNOVATIONSWILLBEREQUIREDTHEMOSTIMPORTANTMATTERINTHEDEEPMINEISTHEVERTICALTRANSPORTANDTHEMINEHOISTINGUSEDINTHESHAFTFROMTHELITERATURE112RESULTSTHATBMRBLAIRMULTIROPEHOISTISPREFERREDTOBEUSEDINDEEPMINESINSOUTHAFRICAFROMTHEECONOMICPOINTOFVIEW,THEMOSTIMPORTANTFACTORSARECONSTRUCTIONANDPARAMETERSOFWINDINGROPESSAFETYFACTOR,MAINLY,MINEHOISTINGDRUMSCAPACITY,THISARTICLEOFINFORMATIVECHARACTERPRESENTSSHORTLYABOVEMENTIONEDPROBLEMSBASEDONTHELITERATUREDATA112ESPECIALLY,THEPAPERWRITTENBYMEGREENWAYISVERYINTERESTING3FROMTWOTRANSPORTSYSTEMSUSEDINTHEDEEPSHAFT,SUBVERTICALANDTHESINGLELIFTSHAFTSYSTEMS,THESECONDONEISCURRENTLYPREFERREDFIG16HOISTINGINSTALLATIONTHEFRICTIONHOISTUPTO2100M,SINGLEDRUMANDTHEDOUBLEDRUMCLASSICANDBLAIRTYPEDOUBLEDRUMHOISTAREUSEDINDEEPSHAFTSINSOUTHAFRICADRUMWINDERSDRUMWINDERSAREMOSTWIDELYUSEDINSOUTHAFRICAANDPROBABLYINTHEWORLDTHREETYPESOFWINDERSFALLINTOTHISCATEGORYSINGLEDRUMWINDERS,DOUBLEDRUMWINDERS,BLAIRMULTIROPEWINDERSBMRDOUBLEDRUMWINDERSTWODRUMSAREUSEDONASINGLESHAFT,WITHTHEROPESCOILEDINOPPOSITEDIRECTIONSWITHTHECONVEYANCESBALANCINGEACHOTHERONEORBOTHDRUMSARECLUTCHEDTOTHESHAFTENABLINGTHERELATIVESHAFTPOSITIONOFTHECONVEYANCESTOBECHANGEDANDPERMITTINGTHEBALANCEDHOISTINGFROMMULTIPLELEVELSTHEBLAIRMULTIROPESYSTEMBMRIN1957ROBERTBLAIRINTRODUCEDASYSTEMWHEREBYTHEADVANTAGEOFTHEDRUMWINDERCOULDBEEXTENDEDTOTWOORMOREROPESTHETWOROPESYSTEMDEVELOPEDINCORPORATEDATWOCOMPARTMENTDRUMWITHAROPEPERCOMPARTMENTANDTWOROPESATTACHEDTOASINGLECONVEYANCEHEALSODEVELOPEDAROPETENSIONCOMPENSATINGPULLEYTOBEATTACHEDTOTHECONVEYANCETHEDEPARTMENTOFMINESALLOWEDTHESTATUTORYFACTOROFSAFETYFORHOISTINGMINERALSTOBE4,275INSTEADOF4,5PROVIDEDTHECAPACITYFACTORINEITHERROPEDIDNOTFALLBELOWTHESTATUTORYFACTOROF9THISNECESSITATEDTHEUSEOFSOMEFORMOFCOMPENSATIONTOENSUREANEQUITABLEDISTRIBUTIONOFLOADBETWEENTHETWOROPESBECAUSETHEPULLEYCOMPENSATIONISLIMITED,BLAIRALSODEVELOPEDADEVICETODETECTTHEMISCALLINGONTHEDRUM,ASTHISCOULDCAUSETHEROPESTOMOVEATDIFFERENTSPEEDSANDSOAFFECTTHEIRLOADSHARINGCAPABILITYFIG2SHOWSTHEDEPTHPAYLOADCHARACTERISTICSOFDOUBLEDRUM,BMRANDKOEPEWINDERSTHEBMRHOISTISUSEDALMOSTEXCLUSIVELYINSOUTHAFRICA,PROBABLYBECAUSETHEYWEREINVENTEDTHERE,PARTICULARLYFORTHEDEEPSHAFTUSETHEREISONEINSTALLATIONINENGLANDBECAUSEOFTHISHOISTSPHYSICALCHARACTERISTICS,ANDSOUTHAFRICANMININGRULESFAVOURINGITINONERESPECT,THEYAREUSEDMOSTLYFORTHEDEEPSHAFTMINERALHOISTINGTHEDRUMDIAMETERSARESMALLERTHANTHATOFANEQUIVALENTCONVENTIONALHOIST,SOONEADVANTAGEISTHATTHEYAREMOREEASILYTAKENUNDERGROUNDFORSUBSHAFTINSTALLATIONSABLAIRHOISTISESSENTIALLYACONVENTIONALHOISTWITHWIDERDRUMS,EACHDRUMHAVINGACENTREFLANGETHATENABLESITTOCOILTWOROPESATTACHEDTOASKIPVIATWOHEADSHEAVESTHESKIPCONNECTIONHASABALANCEWHEEL,SIMILARTOALARGEMULTIGROOVEVBELTSHEAVE,TOALLOWMODERATEROPELENGTHCHANGESDURINGWINDINGTHESHEAVESCANRAISEORLOWERTOEQUALIZEROPETENSIONSTHEBLAIRHOISTSPHYSICALADVANTAGEISTHATTHEDRUMDIAMETERCANBESMALLERTHANUSUALAND,WITHTWOROPESTOHANDLETHELOAD,EACHROPECANBEMUCHSMALLERTHEGOVERNMENTMININGREGULATIONSPERMITA5LOWERSAFETYFACTORATTHESHEAVEFORMINERALHOISTINGWITHBLAIRHOISTSTHISCAMEABOUTFROMADEMONSTRATIONBYTHEPERMITSTHEBLAIRHOISTSTOGOALITTLEDEEPERTHANTHEOTHERDOONTHEOTHERHAND,THEMININGREGULATIONSREQUIREADETACHINGHOOKABOVETHECAGEFORMANHOISTINGTHEBALANCEWHEELDOESNOTSUITDETACHINGHOOKS,SOAROPECUTTINGDEVICEWASINVENTEDTOCUTTHEROPESOFFFORASEVEREOVERWINDTHISWASTESTEDSUCCESSFULLYBUTTHEBLAIRISNOTUSEDFORMANWINDINGONAREGULARBASISTHEBMRHOISTHASBEENBUILTINTHREEGENERALSTYLESSIMILARTOCONVENTIONALHOISTSTHETHREESTYLESAREFIG3AND4THEGEARLESSBMRHOISTATEASTDREIFONTEINLOOKSSIMILARTOANINLINEHOISTEXCEPTTHATTHEDRUMSAREJOINEDMECHANICALLYANDTHEYAREALITTLEOUTOFLINEWITHEACHOTHERTHISISBECAUSEEACHDRUMDIRECTLYFACESITSOWNSHEAVESFORTHEBESTFLEETANGLETHETWOHOISTMOTORSAREFEDVIATHYRISTORRECTIFIER/INVERTERUNITSFROMACOMMON66KVBUSBARTHEMOTORSARETHUSCOUPLEDELECTRICALLYSOTHATTHESKIPSINTHESHAFTRUNINBALANCE,SIMILARTOACONVENTIONALDOUBLEDRUMHOISTEACHMOTORALTERNATESITSACTIONASADCGENERATORORDCMOTOR,EITHERFEEDINGINORTAKINGOUTENERGYFROMTHESYSTEMTHEGEARLESSBLAIRCANBERECOGNIZEDBYTHEOFFSETDRUMSANDTHEFOURBRAKEUNITSASECONDBRAKEISALWAYSAREQUIREMENT,EACHDRUMMUSTHAVETWOBRAKES,BECAUSETHETWODRUMSHAVENOMECHANICALCONNECTIONTOEACHOTHERMOSTRECENTLARGEBMRHOISTSARE427OR457MINDIAMETER,WITH445476MMROPES1INARRIVINGATADRUMSIZETHEFOLLOWINGPARAMETERSHAVEBEENUSEDTHEROPETOBECOILEDINFOURLAYERS,THEROPETREADPRESSUREATTHEMAXIMUMSTATICTENSIONTOBELESSTHAN3,2MPA,THEDRUMTOROPEDIAMETERRATIOD/DTOBEGREATERTHAN127TOALLOWFORAROPESPEEDOF20M/SWITHTHEABOVEANDANEEDTOLIMITTHEAXIALLENGTHOFTHEDRUMS,AROPECOMPARTMENTOF8,5MDIAMETERBY2,8MWIDE,WASCHOSENTHEUSEOF5LAYERSOFCOILEDROPECOULDREDUCETHEROPECOMPARTMENTWIDTHTO2,15MBUTTHISOPTIONHASBEENDISCARDEDATTHISSTAGEBECAUSEOFPOSSIBLEDETRIMENTALEFFECTSONTHEROPELIFE

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