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ID:240951
大小:148.50 KB
页数:13页
时间:2017-07-13
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1、英语原文HoistingSystemAndSafetyDevicesThomasD.BarkandSeniorMember,IEEEMineSafetyAndHealthAdministrationPittsburgh,Pennsylvania15236Abstract–Asnoted,therearetwomainoperatingmalfunctionswhichcanoccurinahoistsystemthatcankillmenanddamageequipment.1.Overtravelattheshaftext
2、remity.2.Overspeedduringthedutycycle.Whatisrequiredinthecasejustillustratedisadevicethatwouldcheckhoistspeedfarenoughdowntheshaftsothatiftheconveyanceweretravelingtoofastatthatpoint,thehoistwould“E”stopsoonenoughtobringtheskiptoastopbeforeitovertraveleditsstoppingp
3、ointanddiddamage.Thispaperdiscussestheapplicationofasuspensionropebraketoasingleropeminehoist.Technicalchallengesassociatedwithacceleratedropebrakeliningwearandsuspensionropelubricationareaddressed.HOISTINGSYSTEMThehoisttogetherwithitsassociatedplantforanundergroun
4、dmineisthesinglemostimportantandexpensivelementofthemineplant.Thehoistplantconsistsofallthosecomponentsofmineplantthatarenecessarytoelevateore,coal,stone,orwasteandtoraiseandlowerpersonnelandmaterielinthemine.Itiswiththehoistingsystemitself-thesecomponentsofthehois
5、tplantlocatedinthehoistroom-thatengineeringdesignismainlyneeded.Thesekeyfactorsgovernhoistselection:1.Productionrate,ortonnagetobehoistedperunitoftime2.Depthofshaft3.NumberoflevelstobeaccessedTherearebasicallyonlytwohoistingmethods,plussomemodifications,inusetoday:
6、drumandfriction.Thedrumhoiststorestheropenotextendedintheshaft.Thefriction-sheavehoistpassestherope(ortheropes)overthedrivewheelbutdoesnotstoreit.Aminormethodthathasfallenintodisuseisreelhoisting,inwhichasinglewidthofropeiswrappedinmanylayers.AnewmethoddevisedinSou
7、thAfricaforverydeepshaftsismultidrumhoistingusingmultipleropes.DESIGNOFHOISTINGSYSTEMThedesignprocessforaminehotstingstytemshouldbeunderstoodbytheminingengineer,enenthoughthedesignandinstallationarecontractedtoanengineer-constructorfirmandtheequipmentbidtoahoistman
8、ufacturer.Typically,theminingcompanydevelopingthemineassignsitsownengineeringdepartmenttomonitortheentireprocess,includingboththeplanningandconst
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