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1、英文文献RoadheaderapplicationsinminingandtunnelingindustriesH.Copur1,L.Ozdemir2,andJ.Rostami31GraduateStudent,2DirectorandProfessor,and3AssistantProfessorEarthMechanicsInstitute,ColoradoSchoolofMines,Golden,Colorado,80401ABSTRACTRoadheadersofferauniquecapabilityandflexibilityfo
2、rtheexcavationofsofttomediumstrengthrockformations,therefore,arewidelyusedinundergroundminingandtunnelingoperations.Acriticalissueinsuccessfulroadheaderapplicationistheabilitytodevelopaccurateandreliableestimatesofmachineproductioncapacityandtheassociatedbitcosts.Thispaperp
3、resentsanddiscussestherecentworkcompletedattheEarthMechanicsInstituteofColoradoSchoolofMinesontheuseofhistoricaldataforuseasaperformancepredictormodel.Themodelisbasedonextensivefielddatacollectedfromdifferentroadheaderoperationsinawidevarietyofgeologicformations.Thepaperals
4、odiscussesthedevelopmentofthisdatabaseandtheresultantempiricalperformancepredictionequationsderivedtoestimateroadheadercuttingratesandbitconsumption.INTRODUCTIONThemorewidespreaduseofthemechanicalexcavationsystemsisatrendsetbyincreasingpressureontheminingandcivilconstructio
5、nindustriestomoveawayfromtheconventionaldrillandblastmethodstoimproveproductivityandreducecosts.Theadditionalbenefitsofmechanicalminingincludesignificantlyimprovedsafety,reducedgroundsupportrequirementsandfewerpersonnel.Theseadvantagescoupledwithrecentenhancementsinmachinep
6、erformanceandreliabilityhaveresultedinmechanicalminerstakingalargershareoftherockexcavationmarket.Roadheadersarethemostwidelyusedundergroundpartial-faceexcavationmachinesforsofttomediumstrengthrocks,particularlyforsedimentaryrocks.Theyareusedforbothdevelopmentandproductioni
7、nsoftrockminingindustry(i.e.mainhaulagedrifts,roadways,cross-cuts,etc.)particularlyincoal,industrialmineralsandevaporiticrocks.Incivilconstruction,theyfindextensiveuseforexcavationoftunnels(railway,roadway,sewer,diversiontunnels,etc.)insoft12groundconditions,aswellasforenla
8、rgementandrehabilitationofvariousundergroundstructures.Theirabilitytoexcavatealmos
