外文翻译--液压支架.doc

翻译部分英文原文Introduction.Chinascoalreserves,thedistributionofawiderangeofcomplexconditionsofoccurrenceanddistributionofthe1.3m3.5m.dipbelow25degrees,inthemiddleofstabilityandstabilitywhichthefollowingconditionsundertheroofoftheseam,withitsoutputaccountingforabout86%oftotaloutput.Chinasoverallminingfaceinthedistributionofrelieftothemajorityofwhichtiltstabilityandthestabilitywhichtheroofabovethethickseam,andtheotherconditionsundertheseam,theexistinghydraulicsupportpooradaptability,theuseoftheresultisnotsatisfactory.Nationwide,thecomplexgeologicalconditionsandthelackoffundsandotherreasons,despite10yearsofefforts,Fully-levelisstillonly21%,whilefully-developedcountriesabroadgenerallevelhasreached70%80%.FromChinainrecentyearssupportingthereform,thehugeinvestmentoffullymechanizedminingdevelopmentisveryslow.andthehydraulicpropfacetherewasamajordevelopment,asmallnumberofmineshasbasicallyrealizedthehydraulicpropof.Chinafullymechanizedhydraulicsupporttopromotetheuse,therearestillmanyproblemstobesolved.1.VarietySerieshydraulicsupportsthereasonablestructureinourcountry,theconditionsaregoodface,financialstrengthoftheminingareabasicallytheuseofthefullymechanized.Althoughsomeotherminingareasfullymechanized,butwiththeintensityofdevelopment,faceincreasinglyworseconditions,thestrikelengthhasbecomeincreasinglyshort.difficultminingcoalseamimbalanceisgettingworse.Withamineormineswithausedone,twotypesofstentsitdifficulttoadapttoallthecoalfaceandconditionsthepurchaseofF-widehugeinvestmentandtechnologyisnotnecessarilyeconomicallyreasonable,themajorityofsmallandmedium-sizedminefundingdifficulties,butsomeoftheexistinghydraulicsupportsaredifficulttoadapttotheminegeologyandproductiontechnology.TheaboveanalysisindicatesthatwhileChinascoalminessupportingthelowlevelofmechanization,hydraulicsupportsandotherfoodmanufacturers.TheproblemisnotsuitableformostgeologicalconditionsandtheproductiontechnologysupportVarietySeries.TakingapanoramicviewofChinascoalminesandstentmanufacturersoftheactualsituation,webelievethatthedevelopmentofChinascoalminingsupportseriesFully-gowiththesimplefullymechanized,high-grademiningandgeneralminingcomprehensiveancillaryroad,Atpresent,thefocusshouldbeonthefullymechanizedsummarysupportingproductresearchanddevelopment.Sinceshiftinghydraulicstent,tofurtherimprovethequalityofproducts,improvefunction,improvingstructure,reducecostsandenhancetheadaptabilitystent.Wemustcontinuetoimproveandinnovateunderspecialconditionsforexploitationofthespecialstent.Forhydraulicprop,althoughdevelopmenthasbeenlaid,butthereisstillalotofproblems,mainly:three-valveclearance,however,pillarsofmaintenancecapacity,highfailurerate,support,demolition,removalofallmanual,labor-intensive；hydraulicpropwithhingedmetalroofbeamssupportinglowefficiency.Therefore,hydraulicpropshouldalsoimproveproductquality,reducecosts,andsupportingthedevelopmentofanexclusivetopbeam,achievepillarsandroofbeamscombineanddoshiftfromrunning.Focusonresearchanddevelopmentofwideadaptation,morepowerful,cheap,simpleandfully-supporting,Sincerangedfromlargehydraulicshiftstentsandstentslipbetweenthetopbeamofthelightframe,bothfromtheshift,wipingthetopandpressure-shiftfunction,butalsowithmonomerstentsmallsize,lightweight,flexibleandadaptabletothechangingcharacteristics,greaterscopetoadapttotheoccurrenceofcoalproductionandtechnologicalconditions.Fully-developmentSimpleLighthydraulicsupporttotheattractionofforeignmentionlegsstent,domesticslidingroofbeamstentsuccessonthebasisofexperience,toovercometheirshortcomings,dostentlightweight,resistance,lowcost,overallfunctionsandadaptability.AccordingtoChinasactualsituationinthecoalmine,webelievethatthedevelopmentofChinaLightEasyFully-hydraulicshiftfromthestent,canbedividedintothefollowingthreesteps:First,tocontinuetoimprovetheslidingroofbeam-typestructure,andimproveitsfunction.furtherexpandthescopeofuse；Second,thetransformationofpooruseoftheCribandFestivalstent,asstructure,F-morereasonableandmoreadaptabletotheshiftinglightfromthestent；Third,thedevelopmentofmoreinnovativefunctionalwhole,structureandworkingmethodsmorereasonablenewlightsincetheshiftstent.Asaresult,thereisaverycompleteportablehydraulicsupportseries.High-gradegeneralminingwillbesimpletofullymechanizedminingdevelopment,generalminingtothehigh-gradegeneralminingtransition,notanincreaseininvestmentinthecircumstances,sothatthemajorityofthemechanizedcoalminingtoimprovethegenerallevelanotch.2.Hydraulicsupportsthetechnicalstatusquo.Inrecentyears,Chinascomprehensivemechanizationofcoalmininglevelhasincreased,Withintegratedmechanizedminingtechnologyandthedevelopmentofnewhigh-powerShearer,theconveyorsemergencerequireacorrespondingstent,butthestentcontrolsystemwithoutcorrespondingimprovementisnotenoughtomeettherequirements.Sofar,Myhomemadehydraulicsupportcontrolremainedinhandwithaone-wayplane-o-controlorthecontrollevel.Suchcontrol,althoughthecontrolsystemissimple,easytomanufacture.andthelowercostofcoalgeologicalconditionschangeadaptationstrongadvantages,butithadseriousshortcomings:poorworkingconditionsofworkers,securityispoor；Movingveryslowly,theimpactontheefficiencyofShearertoplay；ventilationwaspoor,thehighfailurerateofstent；Supportingtheeffectivenessoftheoperationandtheextenttoplaytheexperienceandskillslevelofthenumberofcloselyrelated.Hydraulicsupporttoachieveautomaticcontrol,canbeeffectivelyovercometheabovedrawbacks,achievingtherightstentelectrohydrauliccontrol,andavarietyofcontroloptionsareavailable,Officersintherelativelysafeplacesfocusontheentirefaceofthestentremotecontrolorprocesscontrol.Nowforeignordinaryfullymechanizedcoalfacehydraulicsupporthasachievedthecomputerinfraredelectro-hydrauliccontrol,group.Rowstotheadvancementracks,liquidratedforupto40MPapressure.Lmin300flow450Lminforliquiddiameter100mm120mm.Movingfasterthanthe10mingroup.Domesticandhydraulicsupportsorlowvoltagesolutionforsmalldiameter,artificialmanualoperation.Statisticsactualscene,aforwardsupportgroupwilltakeabout1min.Supportforthelargestfluidpressurenotexceed32MPafor25mmdiameterby30mm,Flowin150200LminLmin.Twocolumnscoverhydraulicsupporttheworkofresistance780t,Fwidth1.5m,usinginfraredPM4electro-hydrauliccontrolsystem,Shearermicrocomputerfromtheremotecontrol,supportcolumnsmorethan400mmindiameter,speed-shiftinggroup10min.3.Fully-developmentSimpleLightstentprospects.Mechanizedmininginthecentralpartofthestentissupporting.Chinasmorethan300existinghigh-gradegeneralminingoperationsandtheuseofhydraulicpropbracing,slow,labor-intensive,productionfalters,andthehighfailurerateofstent,themaintenancecostishigh.Ifasmallinvestment(aboutFully-14-16),high-gradegeneralminingfacedevelopmentassimplefullymechanizedcoalface.Supportingintensityofthestentrealizeshift,andtosomeextentwithpressure-moving,Faceroofmanagementwillbesignificantlyimprovedyield,theeffectivenesswillbesignificantlyenhanced.Summaryoffullymechanizedminingmechanizationlevelalthoughoutpacedlargefullymechanized,butitsadaptabilitylarger,broaderscope,investmentinhigh-gradegeneralminingincreasedmarginally,mechanizationhasincreaseddramatically,significantlyreducedlaborintensity.Forsomelargehydraulicsupportitdifficulttoadapttotheminingdistrictandotherfinancialdifficultiesofsmallandmedium-sizedmine,thelocalcoalmine,Fully-Easydevelopmentisundoubtedlyenhanceminingmechanizationleveltoenhanceeconomicefficiencyandguaranteeproductionsafetyimprovetheworkingconditionsofworkersinawell-establishedtechnique.4.Conclusion.Afternearly30yearsofdevelopmentandhardwork,Chinashydraulicsupportinthedesign,manufacturelevelhasbeenimproving.especiallyi