简介:摘要:S700K交流电动转辙机是我国高速铁路中常用的道岔转换设备,对维持列车运行安全和提高线路运输效率具有重要作用。因此,对于其在使用中出现的异常状态,进行及时的检测、识别、分类及处理,可以将提速道岔故障对列车运行造成的危害降到最低,有效减少维修的经济成本。本文针对S700K提速道岔常见的故障模式总结,根据道岔的故障现象得出其故障原因,对故障点进行判断并给出故障处理意见,为现场维护人员今后的工作提供一定的指导和帮助。
简介:TheanalysesoflighthydrocarbonsinoilsfromtheTarimBasinshowthattheMango'sparameterKisaboutunityexceptthoseoilstrappedintheeasternpartoftheTazhong(CentralTarim)FaultUplift,TheregularvarianceofKmayindicatestheaccumulationandadmixtureoftheoilpopulationsintheeasternpartoftheTazhongFaultUplift.
简介:Thesynopticclimatologyofmonthlymeansurfaceairtemperatureanomaly(MMATA)at47surfacestationsinAsiaisassessedbytwotypesofmaps.ThefirstconsistsofsimplelinearcorrelationcoefficientsbetweentheMMATAatastationandthemonthlymean700hPaheightanomaly(MMHA)at134gridpointsintheNorthernHemisphere.Inwinter,thesefieldsgenerallycontaintwoequallyimportantcenters:acenterofmaximumpositivecorrelationapproximately1300kmfromthereferencestationandanegativecenterabout2800kmtoitsnorthwest.Insummer,thepositivecenterislocatedanaverageof800kmfromthereferencestationandstronglydominatestheMMATA,whilethenegativecenterisnolongerasimportantasinwinter.Thesecondkindofmapisaspecialtypeofanomalycomposite,constructedbymultiplyingthecorrelationcoefficientateachgridpointbythestandarddeviationofMMHAatthesamepoint.Thismapshowstheoptimumdistributionofheightanomaliesforabnormallywarm(orc
简介:摘要:本课题研究区域为铁山南煤矿西翼401采区,对应地表建(构)筑物密集、形式多样且部分建(构)筑物及工业设施对地表变形反应敏感,针对401采区的具体情况,以保护地面建(构)筑物为重点,减少采动对地表建构筑物的破坏,同时又最大限度的提高了煤炭采出率,从而达到“三下”压煤开采实现安全、经济、高效、资源回收率高且环境损害最小的目标。
简介:<正>1IntroductionTheundergroundbrineresourcesdistributingwidelyinSichuanBasin,Chinahavedrawnworldwideattentionduetotheirunusualelementabundanceandexcellentquality.
简介:<正>所谓3S技术即GPS、GIS、RS技术。GPS(全球定位系统)是英文缩写词NAVSTAR/GPS(NAVigationSystemTimeAndRanging/GlobalPositioningSystem)的简称。全称应为“测时测距导航系统/全球定位系统”。GPS是由美国研制,并投入实际应用的最新卫星定位系统。其主要目的是为飞机和船舶导航定位。也可以用于其它多种目的。GPS技术已在航空、航天、航海、军事、地质、石油、勘探、交通、测绘等领域得到广泛的应用。美国于1993年6月26日已将GPS21颗卫星和3颗备用卫星全部发射入轨。
简介:OnJune2011,theBeijingResearchInstituteofUraniumGeology,anInstitutewithintheChinaNationalNuclearCorporation(CNNC),andtheDepartmentofGeology&MiningCNNCcarriedoutaprojectScientificDrillingforDeepMetallogenicResearchintheXiangshanLargeUraniumOreField.AyearlateronJune21,theproject,representingthefirstscientificdrillingofChina’suranium,wasofficiallylaunched,andsuccessfullycompletedonJune17,2013.A2818.88mofdrillingdepthhasbrokenthepreviousrecord1200mofexplorationdepth.TheXD-35DBdrillingmachinedevelopedbyChinaGeo-EquipmentCorporationistheChina’sfirstAC-VFDDirectDriveTopDriveCoreDrill.Ithasgreatlyimproved
简介:Byusingthe40Ar-39ArchronologicalmethodtodateK-feldsparfromK-feldspargraniteintheQiaohuotecopperdistrict,theauthorsobtainedaplateauageof274.78±0.44Maandanisochronageof272.7±3.0Ma.BecausethereisnotectonicdeformationoverprintedorhydrothermalalterationintheK-feldspargraniteintrusionafteritsemplacement,the40Ar-39AragerepresentsthecrystallizationageofK-feldsparinK-feldspargranite,i.e.thelatecrystallizationageoftheK-feldspargraniteintrusion,whichindicatesthattheK-feldspargraniteformedintheintraplateextensionalstageduringtheEarlyPermian.Moreover,basedonthespatialrelationshipbetweentheK-feldspargraniteintrusionandcopperorebodies,variationsofcopperoregrade,REEcharacteristicsofK-feldspargraniteandcopperores,andHandOisotopiccompositionsoffluidinclusionsincopperores,themetallogenesisoftheQiaohuotecopperdepositisdirectlyrelatedtointrusiveactivitiesoftheK-feldspargranite,andthusthecrystallizationageofK-feldsparinthegraniteapproximatelyapproachesthemetallogenicepochoftheQiaohuotecopperdeposit.
简介:Sn-polymetallicoresatDachang,GuangxiAutonomousRegion,China,arehostedinMiddle-UpperDevonianreeflimestones,siliceousrocks,bandedandlenticularlimestones,etc.Twotypesoforebodiescanbedistinguishedaccordingtotheirtelationstothebedding:oneisdistributedalongthebeddingandthe.othercutsacrossthebedding.SnandsulfideorebodiesassociatedwithK-feldsparearemostlycharacterizedbylaminatedorestructure.MicroscopicexaminationsofK-feldspar-bearingrocks,inconjunctionwithX-raydiffraction,chemicalcomposiionandcathodoluminescencedataforK-feldspars,aswellastheirtelationstomineralization,theauthorsconsiderthattheK-feldspareareofauthigenicorigin,subordinatetotheepigeneticstageofdiagenesis,Theyresultedfromthereactionofmixed,deep-seated,circulatingundergroundhotwatersrichinK,AlandSiwithargillaceouscarbonatesduringtheIndonesianorogenicmovement.ItissuggestedmoreattentionshouldbepaidtotheeffectofauthigenicK-feldsparsonSnmineralization.Inthemeantimetheeventrelatedtocirculatingundergroundhotwatersshouldalsobetakenintoaccountsoastoprovidenewcluestoblindoreprospecting.