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14220086JOURNALOFGEOMECHANICSVol114No12Jun.2008:100626616(2008)0220135206:2006210231:,No1ZDJ200725;,N1,,3,,,1,1,1,2(11,100085;21,100101):,,,,,:;;;:P31519:A0,()32km,10,,,,,,1,160km1525km,,4000m,,2500m,,5000m,,650m,,,,12km,,,,,,,,o40704018.:19782:,;,;,;,;,;,,50km,,,,;30km,,,3311,[12],,,,,,,()(),,,(1),,,,,,,,,NWNNE(X)NW,EW,,312,(),F1F2,,,,(1),,,,,EW,NWNN[3],NWNSW,NNNWS,SN,,6312008EEEE1([1],)Fig11Geologicalsketchmapofthecandidatedamsite(modifiedfromreference[1])11;21;31:;41:;51:;61:;71:;81:;91:;101;111;121;131;141;151;161;171;181SN,F1F2,,F1F2,40,5057[3],SN[3],EW,F1F2280285809026527584,F1F2,[1,3],-1300m,N2300m,,[46],F2,QQ3,,FFQ3,NNWSN,[],FTL161557312:212E71191[1],151394162[1]F2,,,,14C,312,Q3F2,317211123,F2317F1,F1,F2,,F2F1,F2,F2,F2[8];,,1015,,[1]:,SN,,,,,,,,4[35,912],1716,11611812388,50km,19447∀/100km,17167∀−,130km,,,,,[5],,,NWNWW,18128,[35],710M2700,77,6158,8[6],1007,8312008F214C1610M810Table1Summaryofearthquakeswith610M810inthewestoftheNorthernTianshanMountains(N)(E)1716431281107∀−IX1766121944178219610178616119441080186101812131843178315810IXX19051121234319851681019391212344108410610194413110441084107∀/IX195514124441283166∀−1958112121441580196∀−19621812044138117614197316134414831561025063%10%3%,505%1002%,1Π400012g,,012g2([10],)Table2Earthquakeintensitiesandpeakaccelerationofbedrocksforthedamengineeringarea(modifiedfromreference[10])5010063%10%5%3%2%()618811814816911(Gal)491501881922581633161964611975,,[34],F1F2,,,615,710,19312:02g[1],,,,.[J].,1994,12,2(2):1322.[2]DengQi2dong,etal.PaleoseismologyoftheNorthernPiedmontofTianshanMountains,NorthwesternChina.JGR,1996,101(29).[3].[M].,,1997.9.[4]FengXian2yue.ActiveRaultinNorthTianshanRegion.JournalofEarthquakePredictionofResearch,1996,5(3).[5],,,.[J],,1988,3:244252.[6],,.[J],,2003,6,17(2):109116.[7],,,.[J],,2003,12,9(4):371378.[8],.(GB5028799)[S].1999.[9].[J],,1989,1:3441.[10],,,.[J].,2000,9,14(3):229233.[11].[M].,,1985.9.[12].[J].,1986,6:4850.TECTONICSTABILITYANALYSISOFTHEKAXRIVERHYDROELECTRICPROJECTAREAWANGCheng2hu1,ZHANGYan2shan1,XIONGYu2zhen1,KONGDe2hu2(1.InstituteofCrustalDynamics,ChinaSeismologicalBureau,Beijing100085,China;2.GreatWallDrilling&ExplorationCo.Ltd.,SinoPEC,Beijing100101,China)Abstract:Thispaperhasstudiedthetectonicstabilityofadamsiteforalarge2scalehydroelectricproject,andanalyzedtheregionalgeologicaltectonicsetting,activityoffaults,historicalearthquakes,tectonicstressfieldsoftheprojectarea.Theanalysisindicatesthatthedamsiteofthehydroelectriccandidateprojectliesinarelativelystableblockofthetectonicallyactiveregion,wherethefaultmovementisratherweakandsoistheregionaltectonicmovement.Therefore,thissitecanbecontrolledbyengineeringmeasuresandissuitabletotheconstructionofthehydroelectricproject.Keywords:KaxRiverfault;hydroelectricproject;tectonicstability;activityoffault0412008