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英文原文BOOMTIMEAHEALTHYMARKETMEANSTHATUNDERGROUNDTRUCKANDLHDMARKERSAREENJOYINGHIGHORDERLEVELS,WITHNEWMODELSANDTECHNOLOGYALSOCOMINGINTHELHDSECTOR,SEVERALNEWMODELSAREALREADYONTHEMARKETFROMFIRMSINCLUDINGEJC,FERMEL,RHAMEQUIPMENTANDSCHOPFWMEOCTNOV2004,WHILEATLASCOPCOINTENDSTOLAUNCHATLEASTONENEWDESIGNIN2005–POSSIBLYANST14BUTITISTHETRUCKSECTORTHATISTHEMOSTACTIVERIGHTNOWWITHRENEWEDEMPHASISONPOWERTOWEIGHTRATIOSRIGHTTHROUGHTHEPAYLOADRANGETHELATESTMODELSARETAKINGADVANTAGEOFADVANCESINDIESELTECHNOLOGYBYFITTINGMOREPOWERFULENGINESANDALLOWINGBETTERSPEEDSONSTEEPRAMPHAULSTHEIMPACTOFTHISISSIGNIFICANT,ASHIGHERSPEEDSMEANLOWERCYCLETIMESANDOFFERMAJORGAINSINPRODUCTIVITY,EVENALLOWINGREDUCTIONSINFLEETSIZESATTHETOPOFTHEPAYLOADSCALECOMPETITIONISNOWPARTICULARLYFIERCESANDVIKTAMROCKISCERTAINLYPUSHINGTHEBOUNDARIESWITHITSTORO60,ATHREEAXLETRUCKWITHARIGIDCHASSISANDA60TONNECAPACITYTHISCUMMINSPOWEREDTRUCKOFFERSAGOODPOWERTOWEIGHTRATIOANDAPAYLOADADVANTAGEOVERCATERPILLAR’SAD55ANDATLASCOPO’SMT5010THATSANDVIKTAMROCKSAYSSHOULDALLOWMINESTOTRIMFLEETSIZE,ESPECIALLYOVERLONGERRAMPHAULSSANDVIKTAMROCKEXPECTSTHETORO60TOTAKEBACKSOMEOFTHEMARKETCLAIMEDBYCAT’SSUCCESSFULAD55,WITHITS55TONNEPAYLOADHOWEVERATLASCOPCOISFIGHTINGBACKAGAINSTBOTHCATERPILLARANDSANDVIKTAMROCKWITHYETANOTHERUPGRADETOITSMT5010TRUCK,PROVIDINGAPOWERINCREASEFROM488597KW/650800HPTHENEWCUMMINSQSK19DIESELBOOSTSTHEMT5010’SPOWERTOWEIGHTRATIOFROM52765KW/TONNE,ALLOWINGITTORECLAIMGROUNDOVERTHEAD55ANDTORO60,DESPITETHEIRLARGERPAYLOADATLSECOPCOALSOSAYSTHATDRIVELINEPROBLEMSWHICHAFFLICTEDEARLIERTRUCKDESIGNSHAVELONGSINCEBEENELIMINATEDTHECOMPANYPOINTSOUTTHATMT5010ISASUCCESSFULDESIGNWITHUNITSOPERATINGIAUSTRALIARECORDINGSPEEDSOF14KPHON110RAMPS,DESPITEHAVING23,000HOURSONTHECLOCKEVALUATINGWHICHOFTHESETHREETRUCKSOFFERSTHEHIGHESTPRODUCTIVITYCOULDONLYBEACHIEVEDBYDETAILEDSTUDYANDPERHAPSREQUIRETESTING,POSSIBLYWITHADIFFERENTRESULTDEPENDINGONTHENATUREOFTHESPECIFICMININGAPPLICATIONTHEREVISEDMT5010HASAHIGHERPOWERTOWEIGHTRATIOTHANEITHERTHEAD55ORTHETORO60BUTTHESETRUCKSHAVEBIGGERPAYLOADSOF55AND60TONNESRESPECTIVELYTHEMACHINETHATBESTSUITSAGIVENMININGOPERATIONMAYBEDUETOANUMBEROFBASICFACTORSSUCHASHAULDISTANCEANDRAMPGRADIENTASWELLASVENTILATIONINFRASTRUCTURE,AMBIENTTEMPERATUREANDEVENMATERIALTYPEOVERALLTHOUGHTHECUSTOMERWILLBETHEWINNER,WITHTHELATESTLARGEATLASCOPCO,CATERPILLARANDSANDVIKTAMROCKTRUCKSALLOFFERINGMUCHBETTERPRODUCTIVITYANDRELIABILITYTHANWASEVERAVAILABLETOTHE50TONNECLASSBEFORETHESAMEDORTOFPOWERTOWEIGHTRATIOGAINSCANBESEENFURTHERDOWNTHETRUCKPAYLOADRANGEATLASCOPCO,CATERPILLAR,DUX,EJC,MTIANDZANAMLEGMETHAVEALLFITTEDMOREPOWERFULDIESELSTOTRUCKSWITHPAYLOADSINTHE1230TONNERANGE,WITHSIMILARBENEFITSTOTHOSESEENATTHETOPOFTHECAPACITYSCALEFOREXAMPLE,ONECANADIANMINEREPLACEDITSEARLIERGENERATION16AND17TONNERSWITHNEWER20TONNERS,WHICHOFFERSHORTTRAVELTIMESONRAMP,DESPITETHEIRINCREASEDPAYLOADANDTHISHASRESULTEDINASUBSTANTIALPRODUCTIVITYGAINOVERALLTHATTHENEWGENERATIONOFENGINESPRODUCEMOREPOWERFROMSIMILAROUTERDIMENSIONSISIMPORTANT,ASTHEYGIVEABETTERPAYLOAD/LITREOFFUELBURNEDHOWEVERTHECLEANEREMISSIONSHAVEADDEDBENEFITS,WITHCOSTADVANTAGESTOMINEVENTILATIONREQUIREMENTSINGENERAL,THENEWSMALLMIDSIZEDTRUCKSTHEMSELVESAREEXTERNALLYSIMILARTOPREVIOUSMODELS,BUTAREFITTEDWITHSTRONGERDRIVETRAINSANDAXLESTOCOPEWITHTHEADDITIONALPOWERWMEOCT2004WMENOV2004SMALLDETAILCHANGESLIKEEXTENDEDOILLIFEORFILTERSWITHREPLACEABLEELEMENTSMAKEIDENTIFIABLEBENEFITSTOSERVICECOSTSWHILETHEBASICDESIGNSOFTHESEUPDATEDTRUCKSREMAINSSIMILAR,THEBETTERDRIVELINESANDNEWGENERATIONDIESELSMEANTHATTHEMACHINESREQUIRELESSMAINTENANCEAREMORERELIABLEANDARECONSIDERABLYCHEAPERTORUNSELFDRIVEAUTOMATIONISSTILLONTHEAGENDAWITHREGARDTOLHDSANDTRUCKS,WITHTHEMANYBENEFITSBEINGSHOWNATTHOSEMINESTHATHAVETAKENTHEPLUNGEANDOPTEDFORTHISTECHNOLOGYTHESEISSTILLPROGRESSTOBEMADEWITHREGARDTOORDERSBUTCATERPILLARANDSANDVILKTAMROCKAREBOTHPUSHINGHARDTOSIGNUPCUSTOMERSFORTHEIRLHDANDTRUCKAUTOMATIONSYSTEMS,MINEGEMANDAUTOMINERESPECTIVELYATTHEMOMENTONLYCODELCOISUSINGTHEFULLAUTOMINEAUTOMATIONSYSTEMATTHEPIPANORTEANDDIABLOREGIMIENTOZONESOFITSEITENIENTECOPPERMINEINCHILEBUTDEBEERSANDSANDVIKTAMROCKAREDEVELOPINGASYSTEMFORTHEFINSCHMINEINSOUTHAFRICAANDWHILECATERPILLARHASYETTONOTCHUPACOMMERCIALSALEFORMINEGEM,THETECHNOLOGYISBEINGUSEDFORPRODUCTIONATTHENORTHPARKESANDOLYMPICDAMMINESINAUSTRALIATHEREAREALOTOFSIMILARITIESINTHEWAYMINEGEMANDAUTOMINEWORK,WITHLASEREQUIPMENTMOUNTEDONBOARDTHELHDSTHESESCANTHETUNNELSAHEADOFTHEMACHINESASTHEYTRAM,PICKINGUPCHANGESINTHETUNNELPROFILEANDALLOWINGTHEMACHINETORECOGNIZEITSPOSITIONINMILLISECONDSTHELASERSUPDATETUNNELMAPSCONTINUOUSLYTO,RESULTINGINLARGEVOLUMESOFDATESHUTTLINGBACKANDFORTHCONSTANTLYCAT’SMINEGEMSYSTEMOPERATESONAWIRELESSLANINFRASTRUCTUREWITHAN11MBPSCAPACITYSANDVIKTAMROCK’SAUTOMINESYSTEMREQUIRESSIMILARBROADBANDCOMMUNICATIONALCAPABILITIESBOTHMINEGEMANDAUTOMINEARECONTROLLEDBYCONVENTIONALANDREADILYAVAILABLECOMPUTINGHARDWARE,WHILEAGOODDEALOFTHECOMPONENTSISSTANDARDOFFTHESHELFITEMSSELECTEDFORTHEIRABILITYTOCOPEWITHTHETOUGHMININGCYCLEWITHTHESETECHNOLOGIES,ONEOPERATORCANSUPERVISETHERUNNINGOFUPTOTHREELHDSTHATRUNMOREORLESSAUTONOMOUSLY,WITHT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