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1、AnewmethodforminingdeformationmonitoringwithGPS-RTKGAOJing-xiangi.2,LIUChaoz,WANGJiani.2,LIZeng-ke2,MENGXiang-chaoz1.KeyLaboratoryforLandEnvironmentandDisasterMonitoringofStateBureauofSurveyingandMapping,ChinaUniversityofMiningandTechnology,Xuzhou221116,China;2・School
2、ofEnvironmentandSpatialInformatics,ChinaUniversityofMiningandTechnology,Xuzhou221116,ChinaReceived19June2011;accepted10November2011Abstract：Basedonrangingintersectiontheory,anewmethodwhichissimpleandeasytooperatewasproposedfordatacollectionintheminesurfacedeformationm
3、onitoringwithGPS-RTKcenteringrodmeasurements.Itcanfullyeliminatetheinevitableshakingerrorandtheverticaldeflection,andtosomeextentweakenthemultipatheffectontheestimatesofcoordinatesinarelativelyshortperiodoftime,usinghigh-frequencyobservations.Theresultsshowthatthree-d
4、imensionalcoordinateswithaheightaccuracybetterthan1cm,horizontalaccuracybetterthan2-4cmcanbeachievedthroughonly15-30scontinuousobservationby20Hzhigh-frequencyandeffectivelyimprovethemeasurementaccuracyandefficiencyofRTK,fullysatisfyingthehigh-speedandhigh-precisiondat
5、aacquisitioninminesurfacesubsidencedeformationmonitoring・Keywords：GPS;roverpole;multipathdelay;deformationmonitoringInordertodevelop,utilizeandprotectthecoalresourcesrationally,andpromoteandensurethedevelopmentofthecoalindustry,theChinesegovernmenthasenactedandimprove
6、dsomerulesandregulations.Akeyproblemoftherulesisthathowtoconfirmtherangeofprotectingcoalcolumnbydifferentcoalminingmethods,burialdepth,seamthickness,roofandfloorlithologiccharacters,geologicstructure⑴.Typically,aseriesofobservationstationsarrangedatregularintervals(15
7、-25m),measuringrelativedisplacementsofthestationsbythetraditionaltechniques(leveling,totalstation,etc),wereestablishedtosummarizethechangelawofparametersofsurfacemovementforproductionandconstructionofmine,2LHowever,thesurfacedeformationisexpensivetocarryoutorcannotbem
8、easuredbytraditionaltechniquesinsomecoalmineareas,especiallyinthemountain.Hence,itisnecessarytoemployeffectivetechniquestoob
