Csamt方法在隧道勘探中的应用.doc

夏训银1王身龙1王洪生1严良俊2吴丹1()摘要:襄渝增建二线老河口~安康段白石河隧道地形复杂、隧道埋深大,常规的物探方法难以开展。CSAMT法具有地形条件限制小、勘探深度大、观测效果高、兼有测深和剖面研究等特点,可较好地解决这个问题。本文介绍了CSAMT法的工作原理和野外施工方法,采用带地形的二维多参数联合反演,可较好地解决地形影响和静态效应。通过对CSAMT资料的分析,结合地质特征解释认为,高阻层主要为石英片岩,中阻层为云母片岩、炭质硅质岩,含炭质片岩为低阻层,近直立低阻异常为断裂破碎带。关键词:CSAMT,电阻率,铁路隧道,二维反演,异常特征。APPLICATIONOFCSAMTTOTHEEXPLORATIONOFRAILWAYTUNNELXiaxunyin1Wangshenlong1WangHongsheng1YanLiangjun2WuDan1(,Tianjin,300181,China;,YangtzeUniversity,Jingzhou,434023,China)DuetoduplicatedterraceanddepthtunnelintheBaishihetunnelofthesecondXiangyurailwaylineinthebandofLaohekou-Ankang,mongeophysicalprospectingwhileCSAMTcanresolvetheproblembecauseitenjoyslesslimitedterraceconditions,depthprospectingandexploration,highobservationresults,betterbathymetryandbisectresearch,’sprinciplesandconstructionmethodsinoutdoors,CSAMTcanresolveterraceinfluenceandstaticstateeffectforadopting2Dmulti-,quartz-schistmainlydepositsinhighresistivitylayer,glimmerite,carbonoliteandsilicolitesmainlyfindinmiddleresistivitylayer,schistandcarbonwillbefindinlowresistivitylayer,—安康段地处陕西省与湖北省交界地区,地形起伏较大,山峰林立,沟壑纵横,最低