山丹地应力监测站体应变仪的地震效应

14220086JOURNALOFGEOMECHANICSVol114No12Jun.2008:100626616(2008)0220097212[],,;,,(),,;,,:2008207219(636)(62),,,,25@y11,,(,100081):,TYB22000A2007820087174MS410MS816,85,,,,:;;;;;:P553,P315:A2008512,810,,,844,,,,,411,,,,,::1212010700:194Email:penghuabgs200ahoocomcn1,1010021E,384745N,2340100m,,()()(),S,,-,,-,,-,1km,,TYB22000A,2000,10-11(10-8),,RS485,,GPRSCDMAVPN,Internetnet,[13],,(2),(12),(35),,20077,81600,10-1010-11,,,,,24AD,,,,,,,,,[413]:A=A0sint-xV,(2f);V;:x=5A5X=x0cost-xVy=5A5Y=y0cost-yVz=55Z=zzV,xyz892008A0cost-000v:v=x+y+zSacksEvertson,,[1415]PS,SH,TYB22000A,,2000,10-11,140db,(020Hz),(012510Hz),20077,1312007912MS815Fig11SeismicstrainwaveoftheMS815earthquakeinsouthernSumatrainthesea,Indonesia,onSeptember12,200722008321MS713Fig12SeismicstrainwaveoftheMS713earthquakeatYutianinMarch21,2008992:32008719MS713Fig13SeismicstrainwaveoftheMS713earthquakeattheeastcoastofJapanπsHonshu,onJuly19,20082,,,19,Lamb,[16]Benioff(1961)[17],,(2002)20041226[18],4,2008530410,6001200,42008530410F1Of1fQ,My3,,0012008ig4scillationso40atershockatingchuanona02008[19],,200807170658221351320080713MS610(56),600,,:,,,,,,520080717065822513Fig15TheEarthπsfreeoscillationsbeforeandafterMS513earthquakewestofTanggulaMountains,Qinghaiat065822onJuly17,2008620080713MS610Fig16TheEarthπsfreeoscillationsbeforeandafterMS610earthquakeintheseaareaofHengchun,Taiwan,onJuly13,20081012:32007822008719,,174,MS410,MS610,,:MS=-1185+2lgD:MS;D,:MS410,843km;MS510,2668km;MS610,8438km;MS710,26683km,,,615,4810,410810140789,,1:F,,72008512191058610(810)Fig17StraincurveoftheMS610Wenchuanaftershockat191058,May12,2008(aftershockoftheMS810Wenchuanearthquake):,:MS=algF+blgD+c:abc,a=0152;b=1175;c=0145,2012008820085131507611(810)Fig18StraincurveoftheMS611Wenchuanaftershockat1507,May13,2008(aftershockoftheMS810Wenchuanearthquake)920085141054516(810)Fig19StraincurveoftheMS516Wenchuanaftershockat1054,May14,2008(aftershockoftheMS810Wenchuanearthquake)5:,,,[2022]51,,3012:1,10-810-5,,(10-8),:,140160db(10-10);(),,,,,;,,,,,,(),,,,8101110106n,10,,,1020085121428(810)F1S,My,(ffMS1Wq)4012008ig10trainmonitoringcurveat1428a122008atershockothe80enchuanearthuakeMS810844km(1110106n),,108,,,?20070816MS718(11)20070920MS619(12),,112007816074058MS718Fig111NegativestrainstepofMS718earthquakeinthecoastofPeruat074058,August16,2007122007920163113MS619Fig112NegativestrainstepofMS619earthquakeintheseasouthofSumatra,Indonesiaat163113,September20,2007512()--()-(),,,,,,,,,1,6,,3,31355012:8048717117(14)716(15),,-,13810(2008151105114)Fig113ThedistributionofstrainanomalybeforetheMS810Wenchuanearthquake(2008151105114)14713(200813120)Fig114StrainsteponthedaybeforetheMS713Yutianearthquake(200813120)6,,850km410;,,;,;,,,,601200815716(20081714)Fig115StrongstrainstepatonthedaybeforetheMS716earthquakeattheSeaofOkhotsk,Russian,(0),(),,,,,,,[1],,.[J].,2006,12(1):96104.[2],,,.[J].,2006,12(3):295304.[3],.[J].,2007,13(1):1524.[4]PengHua,MaXiuMin.In2situStressMonitoringNetworkalongQinghai2TibetRailway[A].InternationalYoungScholarSymposiumonRockMechanics2008[C].A.A.BalkemaPublishers.[5],,.[A].[C].:,2005.[6]CaiMeifeng,PengHua.StressFieldCharacteristicsandStabilityAnalysisoftheSpecialLongandDeepBuriedTunnelfromMaketoKekeRiveronWestLineofSouth2NorthDiversionWaterProject[A].InternationalYoungScholarSymposiumonRockMechanics2008[C].A.A.BalkemaPublishers.[7]MaXiuMin,PengHua.StressCharacteristicsofDali2LijiangpartingofYunnan2TibetRailwayandtheimpactoftherailwayproject[A].InternationalYoungScholarSymposiumonRockMechanics2008[C].A.A.BalkemaPublishers.[8],,,.[J].,2005,11(3):278285.[9],,.[J].,2005,11(4):38633[],,,[],5,()357012:9.10.J.200112:1144.[11],,.-[J].,2006,25(5):800803.[12],,.[J].,2006,28(6):643648.[13],,.[J].,2006,27(2):181186.[14].[J].,2001(6):510.[15].():,[M].:,2003.[16]LambH.Onthevariationsofanelasticsphere[J].LondMathSocProc,1882,13:233256.[17]BenioffH,PressFandSmithS.Excitationofthefreeoscillationsoftheearthbyearthquakes[J].JournalofGeophysicalReaearch,1961,66(2):605619.[18],.-[J].,2002,(6):59.[19].[J].,1999(23):1013.[20]ItsuoFuruyaetal.RayleighWavesRecordedbytheVolumetricStrainmetersattheTimeofaRatherSmallVolcanicEruption[J].MeteorologyandGeophysics,vol.42,No.3,1991.[21].[J].,1998,47(2).[22]ItsuoFuruya,AtsuoFukudome.Characteristicsofboreholevolumestrainmeteranditsapplicationtoseismology[J].J.Phys,No.34,1986.ANALYSISOFTHEVOLUMESTRAINDATAFROMTHESHANDANIN2SITUSTRESSMONITORINGSTATIONPENGHua,MAXiu2min,JIANGJing2jie(InstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100081,China)Abstract:TheauthorsanalyzedthevolumestraindatarecordedfromJuly2007toJuly2008intheShandanin2situstressmonitoringstationbyusingthestatisticalmethod,madeacorrelationoftheseseismicdatawiththoserecordedfromotherstationsandstudiedthestrainseismicwaves,comseismicstrainstepanditscontainedphysicalsignificance,thusrevealingthenatureoftheseismicstrainwaves.Thedatatrendshadpronouncedanomalies.TheeffectofcomseismicvariationobservedbythevolumestrainseismographintheShandanin2situstressmonitoringstationwasmainlythetensionalstep.Keywords:Wenchuanearthqu