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1、AnewmethodforminingdeformationmonitoringwithGPS-RTKGAOJing-xiang1,2,LIUChao2,WANGJian1,2,LIZeng-ke2,MENGXiang-chao21.KeyLaboratoryforLandEnvironmentandDisasterMonitoringofStateBureauofSurveyingandMapping,ChinaUniversityofMiningandTechnology,Xuzhou221116,China;2.SchoolofEnviro
2、nmentandSpatialInformatics,ChinaUniversityofMiningandTechnology,Xuzhou221116,ChinaReceived19June2011;accepted10November2011Abstract:Basedonrangingintersectiontheory,anewmethodwhichissimpleandeasytooperatewasproposedfordatacollectionintheminesurfacedeformationmonitoringwithGPS
3、-RTKcenteringrodmeasurements.Itcanfullyeliminatetheinevitableshakingerrorandtheverticaldeflection,andtosomeextentweakenthemultipatheffectontheestimatesofcoordinatesinarelativelyshortperiodoftime,usinghigh-frequencyobservations.Theresultsshowthatthree-dimensionalcoordinateswit
4、haheightaccuracybetterthan1cm,horizontalaccuracybetterthan2−4cmcanbeachievedthroughonly15−30scontinuousobservationby20Hzhigh-frequencyandeffectivelyimprovethemeasurementaccuracyandefficiencyofRTK,fullysatisfyingthehigh-speedandhigh-precisiondataacquisitioninminesurfacesubside
5、ncedeformationmonitoring.Keywords:GPS;roverpole;multipathdelay;deformationmonitoringInordertodevelop,utilizeandprotectthecoalresourcesrationally,andpromoteandensurethedevelopmentofthecoalindustry,theChinesegovernmenthasenactedandimprovedsomerulesandregulations.Akeyproblemofth
6、erulesisthathowtoconfirmtherangeofprotectingcoalcolumnbydifferentcoalminingmethods,burialdepth,seamthickness,roofandfloorlithologiccharacters,geologicstructure[1].Typically,aseriesofobservationstationsarrangedatregularintervals(15−25m),measuringrelativedisplacementsofthestati
7、onsbythetraditionaltechniques(leveling,totalstation,etc),wereestablishedtosummarizethechangelawofparametersofsurfacemovementforproductionandconstructionofmine[2].However,thesurfacedeformationisexpensivetocarryoutorcannotbemeasuredbytraditionaltechniquesinsomecoalmineareas,esp
8、eciallyinthemountain.Hence,itisnecessarytoemployeffectivetechniquest