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1、作者對文章發(fā)表錄用情況說明:本文被地球物理學(xué)進(jìn)展錄用,預(yù)計(jì)明年上半年發(fā)表,已經(jīng)保證不在向外界刊物發(fā)表,本文限于內(nèi)部刊物并不上傳相關(guān)網(wǎng)絡(luò)。陷落柱的地震響應(yīng)特征分析及應(yīng)用張玉法1,2,王大剛2,崔國華2(1.成都理工大學(xué),成都610000;2.四川省煤田地質(zhì)工程勘察設(shè)計(jì)研究院,成都610072)摘要:通過分析陷落柱的地質(zhì)特征和物性特征,進(jìn)行地震數(shù)值模擬,分析其地震響應(yīng)特征,在實(shí)際資料中進(jìn)行應(yīng)用。結(jié)果表明:從單炮記錄上觀測陷落柱,主要是考慮陷落柱的下凹特征,需考慮凹界面的曲率與埋深之間的關(guān)系。從物性上看,陷落柱內(nèi)部與外部的物
2、性差異變化為地震資料區(qū)分陷落柱建立了基礎(chǔ)。在陷落柱上方,地層裂隙發(fā)育,引起地震振幅能量弱,具有下凹趨勢,在陷落柱的內(nèi)部,地震波反射波到達(dá)時間延遲,能量弱,相位下凹,甚至反射波零亂。在水平切片上,能看到明顯的圈狀異常。關(guān)鍵詞:陷落柱地震屬性響應(yīng)特征中圖分類號文獻(xiàn)標(biāo)識碼文章編號SeismicresponsecharacteristicsofthecollapsecolumnanalysisandapplicationofZHANGYU-fa1,2,CUIGUO-hua2,WANGDa-gang2(1.ChengduUniv
3、ersityofTechnology,Chengdu610000,China;2.SichuanCoalGeologicalEngineeringDesign&ResearchInsitute,Chengdu610072,China)Abstract:Baseonthecollapsecolumncharacteristicsandphysicalpropertiesofgeologicalfeatures,seismicresponsecharacteristicsofthecollapsecolumnwasanal
4、yzedbyseismicnumericalsimulation,apracticedatawascollectedandancollapsecolumnwasinterpretedaccordingtothesecharacters.Theresultsshowedthat:thephysicalpropertiesdifferenceamongtheupward,internalandsurroundingofthecollapsecolumnleadtochangesinseismicwaves.Onthetop
5、oftheCollapsecolumns,thelayersshowsslightlyorsignificantlysubsidencewithinformingconcavesurface,groundfissures.TheinnerlayeroftheCollapsecolumnsshowsobvioussubsidence,andthelowerP-wavevelocityanddensitycomparingwiththesurrounding.Forasingleshotrecord,weneedtocon
6、sidertherelationshipbetweenconcavecurvatureandthedepthoftheinterface.IfthesourceislocatedinthecenteroftheConcaveinterface,thereisrotationwave,ifwesetshotandreceivertolocateatthecenteroftheconcaveinterface,wecanclearlyseethefocusreflectioninthesingleshotrecord.If
7、theshot,belowtheconcavecenter,wecanseetheordinaryreflectedwave,whilethereflectedwavedelays.Forastackedseismicdata,ifthereisthecollapsecolumn,wecanobservethedifferentseismicresponsecharacteristicsindifferentlocations.OnthetopofthecollapseColumn,theenergyofseismic
8、wavesshowsweak,thereflectedwavelooksInferior.TheinnerlayerofthecollapseColumnhasaconcavefeatures,wecanseering-shapedanomalyinthehorizontalslice.Keywords:collapsecolum