地震波CT成像系统

ApplicationofcrossholeseismicwaveCTinKarstExploration跨孔地震CT在岩溶探测中应用Zhaowei赵伟Content主要内容一．Introduction(引言)二．Thebasicworkingprincipleofcross-holeseismicCTmethod(跨孔地震CT法基本工作原理)三．Equipmentintroduction(仪器设备介绍)四．Applicationexampleanalysis(应用实例分析)一．IntroductionInthecarbonaterockarea,karstenvironmentalgeologicalproblemshavebecomeincreasinglyprominent,highlightsthegrowingimportanceofgeologicalexplorationofkarst.Thecomplexityoftheresultinginkarstgeologicdisastersofeasytransportationconstructionprocess,suchasgroundcollapse,watergushing,andmudandothergeologicaldisasters,casualtiesandsignificantlossofstateproperty,theconstructionscheduleofproject.Therefore,wemuststrengthengeologicalkarstregiondetection.Theroutinegeophysicalmethodisinvestigatedindetailthedistributionlawofthekarstundergroundspace,earthquakeCTinKarstdetectioneffectisgood一．引言在碳酸盐岩地区，岩溶环境地质问题日益突出，岩溶地质勘探工作重要性日渐凸显。岩溶发育的复杂性导致交通建设过程中极易产生突发的地质灾害，如地面塌陷、隧道突水、突泥等地质灾害，造成人员伤亡和重大的国家财产损失，影响工程施工进度。因此，必须加强岩溶地区的地质探测。常规物探方法很详细查清地下的岩溶的空间分布规律，地震CT在岩溶的探测方面效果较好。Fundamental：AccordingtothedegreeoffragmentationanddistributionofseismictraveltimelengthorsizeofCTimageattenuationwhichreflectthedistributionofboundaryandreliablerockallkindsofrockandsoil.根据走时长短或衰减大小构成的地震CT图像可靠反映各类岩土体的分布界线及岩体的破碎程度和分布。Superiority：Openedupanewwayofrockmasspartitioningandvelocityimaging------Higherthantheconventionalwavetestresolution;onthekarstfracturezonesurveymoreefficient;moredetailscanbeusedtoevaluatethestabilityoftherockmass;canaccuratelydeterminespatialpositionsofgeologicalanomaly。开辟了岩体分区和波速成像的新途径------比常规波速测试分辨率更高；对岩溶破碎带的勘测更高效；可对岩体稳定性进行更全面更细节的评价；可准确确定地质异常的空间位置。二、SeismicCTprinciple地震CT原理松散土层（Loosesoil）完整基岩（Completebedrock）震源控制器电火花震源地震仪检波器链跨孔地震CT工作示意图接收孔激发孔SchematicdiagramofcrossholeseismicCTThesourcecontrollerseismographHydrophoneStimulateholereceivingholesparkerSeismicCTimagingsystemmainlyincludesthefollowingparts(地震CT成像系统主要包含以下几个部分)1、dataacquisitionequipment(数据采集设备)2、Transmittingequipmenthole(孔内发射设备)3、Holereceivingequipment(孔内接收设备)4、Processingsoftware(处理软件)三、Equipmentintroduction仪器设备介绍设备及安装震源控制器及电火花震源地震仪及水听器链HydrophoneEquipmentandinstallationTerralocMK6seismograph野外工作照Fieldphotograph储能器impulsegenerator发电机electricgenerator1、广州白云区黄岐二中四、ApplicationexampleanalysisvelocityconventionalsignsoverburdenCompletebedrockweaksoilkarst2、广州夏茅3、广州白云区3、广州白云区Thankyou