資源描述：
《三峽近壩庫段水庫誘發(fā)地震特征分析.pdf》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、JournalofEngineeringGeology工程地質(zhì)學報1004—9665／2013／21(6)-0932-06三峽近壩庫段水庫誘發(fā)地震特征分析木吳世澤①羅飛①房艷國①嚴福章②朱建①賈海萍①(①長江三峽勘測研究院有限公司武漢430074)(②中國國電公司北京100011)摘要大型水利水電工程水庫誘發(fā)地震歷來受業(yè)主、工程技術(shù)人員的重視。三峽工程蓄水10多年來，在蓄水過程中，三峽庫區(qū)較蓄水前地震明顯增多。本文選擇了三峽庫區(qū)既有活動斷裂，又有可溶巖和煤層分布的近壩庫段作為研究對象，通過對庫區(qū)地震活動與水位的關(guān)系和誘發(fā)地震空間展布特征分析
2、，認為：三峽水庫誘發(fā)地震，發(fā)生在有可溶巖和含煤地層部位的塌陷型地震占總數(shù)的90％，而非可溶巖和不含煤地層中只占總數(shù)的10％；近壩庫段地震主要發(fā)生在仙女山斷層北端，且有地震呈叢集活動的特征；九灣溪斷層上盤遠離長江部位地震零星分布，距長江較近地段地震相對增多，下盤地震極少。地震與水位的對應關(guān)系十分密切，三峽水位上升，長江兩岸發(fā)生的小地震較多，當水位蓄至175m時，地震主要發(fā)生在仙女山斷裂的北端和九灣溪斷裂的上盤及北端。關(guān)鍵詞三峽水庫近壩庫段誘發(fā)地震特征分析中圖分類號：TU411文獻標識碼：ACHARACTERISTICANALYSIS0FRES
3、ERVoIRINDUCEDEARTH—QUAKESNEARBYTHETHREEGoRGESDAMWUShize①LUOFei①FANGYanguo①YANFuzhang②ZHUJian①JIAHaiping①(①ThreeGorgesGeotechnicalConsultantsCo．，Ltd．，Wuhan430074)((~ChinaGuodianCorporation，Beijing100011)AbstractReservoirinducedearthquakesoflarge-scalehydropowerprojecthaveal
4、waysaconcernofownersandtechnicalpersonne1．TheThreeGorgesreservoirhasbeenimpoundedfor10years，andtheearthquake~equencyinthereservoirincreasessignificantlyduringtheimpoundment．Anareanearthedamsiteandwithactivefaults，car—bonafiteandcoalseamsischosenastheresearchobject．Analyzet
5、hespatialdistributionofreservoirinducedearth—quakesandtherelationshipbetweenearthquakeandreservoirwaterleve1．Theanalysisresultsindicatethat90％ofthereservoirinducedearthquakesarecollapsinginducedbyearthquakeswhichoccurredincarbonatiteandcoalseams．TheotherlO％occurredinothers
6、tratums．Italsoindicatesthatthea~itudeofstratumhasasignificanteffectonreservoirinducedearthquakes．Theearthquakesnearthedamsitehaveclusteringdistributioncharacteristic，whichmainlyoccu~edatthenorthernpartofXiannvshanFault．SomeearthquakesoccuredinthehangingwallofJiuwanxifault，
7、whichoccurredmoreatthenearbysiteofYangtzeriverandlessinthefarawaysite，whilerarelyOC-curedintheheadingwallofthefault．Thereservoirinducedearthquakesandreservoirwaterlevelarecloselyrelat—ed．WhilethewaterlevelofThreeGorgesreservoirrises，manysmallearthquakesoccuronbothsidesofYa
8、ngtze十收稿13期：2013-08-08；收到修改稿13期：2013—11—15．第一作者簡介：吳世澤，主要從事區(qū)域地質(zhì)、地震地質(zhì)、工程地質(zhì)勘察工作．Email：532356
