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    28 February 2019, Volume 35 Issue 1
    Application of Shallow-hole & Medium-length-hole Shrinkage Stoping Mining Method with Bolting Roof in Iron Mine#br#
    XIA Jianbo,LIN You,LIN Jifei,SHEN Xu,ZHAO Mingliang
    2019, 35(1):  1.  doi:10.3969/j.issn.1009-0479.2019.01.001
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    To solve the problem of roof maintenance in the original mining method in Gaojingcao iron mine,the paper put forward a mining scheme for shallow hole & mediumlengthhole shrinkage stoping method for roof protection with bolts.The orebody is divided into two layers,the upper layer is blasted by shallow hole while the lower layer is blasted by parallel mediumdeephole,andtheupperandlowerlayers are pushed from bottom to top simultaneously.The unstable roof is strengthened by an chorbolts.The mining scheme has been successfully applied to the mines:the miningcutting ratio of 1000 ton swas reduced by2.42m·kt-1,the comprehensive recovery was increased by5.2%,the mining efficiency up by 2.3t·shift-1,the production capacity increased by 120t·d-1,and the direct cost of mining has been reduced by5.6yuan·t-1.The improved scheme has higher practical value and economic benefits.
    PreliminaryStudyonStrengthParametersofExpansiveSoilinWenshanPrefectureofYunnanProvince#br#
    LIU Wei,YIN Qiong,FANG Na,LI Wanhong
    2019, 35(1):  6-10.  doi:10.3969/j.issn.1009-0479.2019.01.002
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    Thereareobviousdifferencesinstrengthparametersofexpansivesoilswithdifferentpropertiesorloadingconditionsduringexpansionandcontraction.Inordertopreliminarilyexploretherelationshipbetweenthestrengthparameterreductionandtheloadandtheswellingforceofthesoilitself,thestrengthparameterreductionexperimentsandthecorrelationexperimentsbetweentheswellingforceandthestrengthreductionwerecarriedout.Theexperimentalresultsshowthatwiththeincreaseofload,thedecreaseamplitudeofstrengthparametersdeclines,suchascohesionCvalueandinternalfrictionangledecreasedfrom72.32% and77.22% at5kPato34.93% and27.42% at40kPa,respectively;andthedecreaseamplitudeofexpansiveforceandstrengthparametergraduallypositivelycorrelatedwiththeincreaseofload.Theresultsshowthattheloadhasacontrollingeffectonthestrengthdrop,mainlyontheinhibitionoffracturedevelopment;thecorrelationbetweentheexpansionforceandthestrengthparameterdropisrelatedtotheloadstate;theratiooftheloadandtheexpansionforceisnegativelyrelatedtotheoveralltrendofthestrengthdrop.
    EquipmentSelectionof“SixMajorSystems”forSafeHedginginM CoalMineinYunnanProvince
    LIUCong,CHENGYong,NIEQi,ZHAOYafang,GAOYajie
    2019, 35(1):  11-14.  doi:10.3969/j.issn.1009-0479.2019.01.003
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    The“sixmajorsystems”forcoalminesafetyandhedgingareoneofthesafetyguaranteesystemsthatthestatemustimposeonmineenterprisestoestablishandimprove.ThispapertakestheMmineinYunnanProvinceasanexample.Basedontheprincipleofsafetyandreliability,technicalfeasibility,economicrationality,theproductionconditionsofMminearediscussedfortheselectionofequipmentinthesystem,whichprovidesdesignbasisformineswithsimilarconditions.
    StudyonBeneficiationTestofaCopperCobaltOreinChina
    SHENXu,XIAJianbo
    2019, 35(1):  15-25.  doi:10.3969/j.issn.1009-0479.2019.01.004
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    Inadomesticcoppercobaltmine,themainmetalmineralsintheoriginalorearechalcopyrite,sphalerite,cobaltbearingpyrite,siderite,etc.Ganguemineralsaremainlyquartz,irondolomiteanddolomite.Theorecontains008% ofCu,028% ofCo,17.79% ofS,19.79% ofFeand0.43%ofAs.ThemainvaluablemetalsrecoveredfromtheoreareCu,CoandS.Consideringthepropertiesoftheore,thepreferentialflotationprocessofcopperandcobaltwasdetermined.TheprocessindexesofCuconcentratecontaining20.15%,Curecovery49.12%,cobaltconcentratecontaining0.81% andCorecovery91.41% wereobtained.
    CauseAnalysisandPreventionMeasuresofInclinedShaftHoistingAccidentinCoalMines:CaseStudyinYunnanProvince
    DENG Kailu,WU Anfei
    2019, 35(1):  26-29.  doi:10.3969/j.issn.1009-0479.2019.01.005
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    Theinclinedshafthoistingsystemisanimportantpartoftheinclinedshaftproductionsystem,anditisthelinkandthroatoftheinclinedshaftproductionsystem.Throughtheanalysisofthecausesofthetypicalaccidentsofinclinedshafthoistingincoalmines,thispaperputsforwardaseriesofmeasurestopreventtheaccident,andmakesitclearthataslongastheinvestmentisguaranteed,theinclinedshafthoistingequipmentanditssafetyprotectionfacilitiesshouldbeselectedcorrectly.Inclinedshafthoistingaccidentscanbeeffectivelycurbedbyconstantlyimprovingtheprofessionalskillsandsafetyconsciousnessofemployeesandimplementingtheresponsibilitysystemforproductionsafety.
    RepairingHolesofLaserPointCloudinBuildingFacade
    MAJuan,SUNXiaoli,ZHAOWenliang,LONGGen
    2019, 35(1):  30-34.  doi:10.3969/j.issn.1009-0479.2019.01.006
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    Basedonthecharacteristicsofthelaserpointcloudholeofthebuildingfacade,thispaperputsforwardtheideaofusingdifferentmethodstorepairholesaccordingtothedifferenttypesofholesandtheregulardegreeofbuildingfacade.Inordertomaketheprocesssimpleandefficient,theseholesarerepairedbydifferentmethodsrespectivelybasedonregularandirregularbuildingfacades.Theexperimentalresultsshowthatthesemethodsaresimple,rapid,effectiveandreliable,whichcanrepairholeseffectivelyandmeettherequirementsoffeaturelinesextractionofbuildingfacadeusingcopyingthecompletepointclouddata,scanninglocalareaandmanualinteractiveinterpolation.
    AnalysisofEstablishingLocalCoordinateSystem forPlateausBasedonCGCS2000
    LUOWensheng,QIUYunfeng,CHENYuhan,YANGHaiguan
    2019, 35(1):  35-40.  doi:10.3969/j.issn.1009-0479.2019.01.007
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    ThroughtheanalysisoftheinfluenceoftopographicalterrainandcomplexlandformoftheplateauareasinsouthwestChinaandthatoftheestablishmentofthelocalcoordinatesystembasedonCGCS2000,thepaperusestheALOSWorld3D30mDSMdatatoobtainthelocalterrainandlandform,whichcancalculateandanalyzethecorrectionvalueoftheelevationofeachkilometer.TakingasanexampleacityinthenorthwestYunnanintheplateauareasofsouthwestChina,thepaperdiscussesontheselectionofthebestcentralmeridian,thecompensationelevationsurfaceandtheestablishmentofthelocalellipsoidofthelocalcoordinatesystemfortheplateau.Throughthecontrolpointsofthekeyrefinementareas,theestablishmentofthelocalcoordinatesystemfortheplateauisrealized,andtheanalysisandverificationofitsaccuracyarediscussedinthepaper.
    Non-specialCycleSlipDetectionofDual-frequencyBasedonDomainSearch
    WANGJianying
    2019, 35(1):  41-47.  doi:10.3969/j.issn.1009-0479.2019.01.008
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    Todetectthemultivalueofdualfrequencycycleslipsandtojudgethecycleslipsontheirownfrequencies,thispaperproposesacycleslipdetectionmethodofdomainsearchthatusesthefreegeometryasthedominantequationbyconstrainingtheboundsofthedualfrequencycycleslips.Usingthedomainvaluesearchalgorithmnotonlysolvesthemultivalueproblem,butalsocanaccuratelydetectthecyclesliponeachfrequency.Throughthecalculationandverificationofthehighsamplingdata,thismethodcannotonlyaccuratelydetectthecycleslipatthesamplingrateof1sand5s,butalsoiseffectiveforthe10sand15ssamplingratedata.Comparedwithothermethods,themethodismoreaccurate,reliableandpractical.
    PerformanceAnalysisofHydraulicHybridVehicleBasedonFuzzyControlStrategy
    ZHOUPeng,DUANBo,KANGNan,YANGJing
    2019, 35(1):  48-53.  doi:10.3969/j.issn.1009-0479.2019.01.009
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    Thebasicprinciplesoffuzzycontroltheorywasintroduced.Thekeycomponentsweredesigned,includingthefuzzycontrollerandthemembershipfunctionoftherelatedparametersandthefuzzyrulerank,etc.TheworkingconditionfactorGKwasproposedtoreflecttherunningconditionsofthevehicles.ThesimulationmodelwasestablishedbasedonMatlab/Simulinkplatform.Theresultsshowed:thefuzzycontrolstrategydesignedinthispaperwaseffective.ItcouldregulatetheexpectedspeedandtheaccumulatorSOCvalue.Theenginetorquecouldbeoperatedmorepreciselyintheoptimaleconomicareas.Thefueleconomywasimprovedby4.07% undertherulecontrolstrategy.
    ModificationofCoolingandSpraySystem forRoadheaders
    LUOZheng,WANGShaoliu
    2019, 35(1):  54-57.  doi:10.3969/j.issn.1009-0479.2019.01.010
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    Thispaperanalyzedthecoolingsystemofroadheaders,whichcannoteffectivelycoolthecuttingmotorandthepumpstationmotor.Thecoolingsystemcannoteffectivelyeliminatetheheatgeneratedbythehydraulicpump,overflowvalveandflowcontrolvalveinthehydraulicsystem.Thedefectsinthespraydustremovalsystemareeasytocausedamageofcuttingarm.Thewaterquantityandspraytimecannotbecontrolledaccurately.Waterfromthecoolingsystemandspraysystemisdirectlydischargedintotheroadway,whichislikelytoresultinroadwaywater,softfloorsurroundingrockandsinkingoftheroadheader.Thecoolingsystem andspraydedustingsystem weremodifiedandgoodresultswereobtained.
    ApplicationResearchofFaceRecognitionTechnologyBasedonOpenCVinIntelligentExaminationSystem
    ZHOUShaojing,YINGJie,CHENZhigang,PANHongbin
    2019, 35(1):  58-64.  doi:10.3969/j.issn.1009-0479.2019.01.011
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    Atpresent,theexaminationinvigilationoftheonlineexaminationsystemisstilldominatedbymanualmanagement.Withthedevelopmentofartificialintelligence,thedemandforunsupervisedexaminationismoreprominent.A newsystem istherebydesigned,whichusesfacerecognitionbasedonOpenCVasthecoretechnologytobuildanunsupervisedonlineexamsystemtoachievesmartexaminvigilation.Theexperimentalresultsshowthatthesystemcaneffectivelysolvetheproblemofunsupervisedandintelligentexamauthentication,andgreatlyreducethemanualinterventionofonlineexams.
    ConstructionandExplorationofExtensibleandOpenInnovationExperimentPlatform withElectronicTechnology
    SHAOYongcheng,JINJianhui,SHAOJunjie
    2019, 35(1):  65-69.  doi:10.3969/j.issn.1009-0479.2019.01.012
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    Onthebasisofcompatibilitywiththeoriginalequipment,aprintedcircuitboardwithopenness,flexibility,universalityandeconomicalefficiencyisdeveloped,andexperimentalplatformviaextensibleandopenelectronictechnologyisconstructed.Thepaperalsoexploredtheoperationoftheplatformandthemodeofcultivatingstudentsinnovationabilityinelectronictechnologyexperiment.
    ResearchonEnergyEfficiencyAssessmentMethodBasedonCloudComputing
    ZHANGLihua
    2019, 35(1):  70-71.  doi:10.3969/j.issn.1009-0479.2019.01.013
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    Withthecontinuousdevelopmentofeconomyandsociety,cloudcomputing,asanewtypeofgreencomputingmode,hasbeengraduallyappliedinrelatedfields.Thispaperfocusesonthecontentofcloudcomputing,andanalysesthespecificmethodsofenergyefficiencyassessmentintheprocessofcloudcomputing,soastopromotethefurtherdevelopmentofcloudcomputingtechnologyinChina.
    ApplicationofUASBandTwostageBiologicalContactOxidationProcessinDairyCompanies’WastewaterTreatment
    GAOXiong,CHENGYongwei,WUYansheng,LIYan
    2019, 35(1):  72-76.  doi:10.3969/j.issn.1009-0479.2019.01.014
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    UASBandtwostagebiologicalcontactoxidationprocesswascombinedtoapplytotreatthewastewaterofadairycompanyinYunnanProvince.Thetreatmentcapacitywas1500m3·d-1.TheresultsshowthatoutputwaterqualityisuptostandardwithparameterslikeBOD5,CODcr,SSandammonianitrogenatAlevelofthefirstgradeof“CitiesSewageTreatmentPlantPollutantDischargeStandard”(GB18918—2002).ThebiologicalcontactoxidationprocesswasusedinthesectionA/O/A/O,soastoreducesludgeproductionandtherunningcostsoftheenterprise.Thesludgeisreusedthroughbiologicaldigestionandmethaneisreusedthroughseparatortechnology.
    AdsorptionofCu2+ onCross-linkedAcylatedChitosanMicrospheres
    ZHANGRunhu,NINGMencui,LILi
    2019, 35(1):  77-76.  doi:10.3969/j.issn.1009-0479.2019.01.015
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    Inthispaper,chitosanwith95% degreeofdeacetylationwasusedasrawmaterial,andthechitosanwasmodifiedbyacylationofsuccinicanhydrideandcrosslinkingofcalciumchloridetoprepareanacylatedchitosancrosslinkedmicrospherewithbetteradsorptionperformanceandbetterstability.TheadsorptionpropertiesofacylatedchitosancrosslinkedmicrospheresforCu2+ werealsoinvestigated.Theexperimentalresultsshowthattheacylatedchitosancrosslinkedmicrosphereshavegoodadsorptionpropertiesforcopperions.Theoptimalconditionsforadsorptionare:theadsorptiontimeofthemicrospherestocopperionsis60minandthepHis6.0.Duringtheadsorptionprocess,theΔGθvalueisbetween13.58kJ·mol-1and11.28kJ·mol-1,ΔHθ=11.61kJ·mol-1,ΔS=76.82J·K-1·mol-1,indicatingthattheacylatedchitosanmicroCu2+ adsorptioninballadsorptionwaterisaspontaneousendothermicandentropicprocess.
    ExpressNetworkDesigningBasedonThree-levelHub-spokeNetwork
    DUANLimei,PanCanhui,ZHANGQionghua
    2019, 35(1):  87-93.  doi:10.3969/j.issn.1009-0479.2019.01.017
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    Basedonthehubandspokedistributionintheurbanexpressservicearea,thethreelevelhubspokeexpressnetworkcanbeestablishedbyallocatingthespokenodes.Thedesignisproposedtominimizethetotalnetworktransportationcost.Threenumericalexamplesresultstriedtodemonstratetheeffectivenessofthethreelevelhubspokeexpressnetworkmodel,theimpactonvariabletransportationcostsinthisnetworkbythegivennumberofthefirstspoke,andtheimpactonexpressdeliverynetworkbythechangesofdiscountfactorsintrunknetwork.
    ResearchonApplicationofProductTraceabilityTechnologyinIntelligentLogistic
    PANCanhui,DENGYongsheng,ZHANGQionghua
    2019, 35(1):  94-100.  doi:10.3969/j.issn.1009-0479.2019.01.018
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    Producttraceabilitytechnologyandintelligentlogisticshavemanycommoncharacteristicsinthecollection,transmissionandstorageofbasicdata.Therelatedtechnologyandinfrastructureofproducttraceabilitysystemcanprovidetechnicalreferenceforintelligentlogisticssystemandsharehardwarefacilitiesandbasicinformation.Inthispaper,thestructuresofproducttraceabilitytechnologyandintelligentlogisticssystemareintroducedrespectively.Bycomparingthetwosystems,wecanfindthatproducttraceabilitytechnologyhasmoreapplicationsinintelligentlogisticssystemdesign.Thispaperanalysestheproblemsexistingintheconstructionandmanagementofproducttraceabilitysystemandtheproblemsthatneedtobeawaredandimprovedintheapplicationofproducttraceabilitytechnologytointelligentlogistics.
    ApplicationofFactorAnalysisonAcademicRecordsEvaluationofVocationalCollegeStudents
    SUNWenxing,WANGJunying,JIANGLi
    2019, 35(1):  101-106.  doi:10.3969/j.issn.1009-0479.2019.01.019
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    Thisarticlebrieflyintroducesthebasicprinciplesoffactoranalysismethod.Theexamresultsof18coursesfrom41studentswereconsideredasthevariablesandthenSPSSstatisticalsoftwarewasusedforthefactoranalysisoftheexamresults.Fourcommonfactorswereextracted,includingprofessionalability,physicalfitness,specializedknowledgeandintegratedcommandofgeneralcourses.Themathematicalmodelofacademicrecordsassessmentwasestablishedtoassessstudents’oneabilityandallroundabilitiesofthe.Thestudycanshedlightonstudentscareerplanningandallrounddevelopmentandteacherscompetencybasedteaching.