陷落柱的地震响应特征及应用.doc

作者对文章发表录用情况说明：本文被地球物理学进展录用，预计明年上半年发表，已经保证不在向外界刊物发表，本文限于内部刊物并不上传相关网络。
陷落柱的地震响应特征分析及应用
张玉法1,2,王大刚2,崔国华2
（1.成都理工大学，成都610000；2.四川省煤田地质工程勘察设计研究院，成都610072）
摘要：通过分析陷落柱的地质特征和物性特征，进行地震数值模拟，分析其地震响应特征，在实际资料中进行应用。结果表明：从单炮记录上观测陷落柱，主要是考虑陷落柱的下凹特征，需考虑凹界面的曲率与埋深之间的关系。从物性上看，陷落柱内部与外部的物性差异变化为地震资料区分陷落柱建立了基础。在陷落柱上方，地层裂隙发育，引起地震振幅能量弱，具有下凹趋势，在陷落柱的内部，地震波反射波到达时间延迟，能量弱，相位下凹，甚至反射波零乱。在水平切片上，能看到明显的圈状异常。
关键词：陷落柱地震属性响应特征
中图分类号文献标识码文章编号
Seismicresponsecharacteristicsofthecollapsecolumnanalysisandapplicationof
ZHANGYU-fa1,2,CUIGUO-hua2,WANGDa-gang2
（1.ChengduUniversityofTechnology,Chengdu610000,China;2.SichuanCoalGeologicalEngineeringDesign&ResearchInsitute,Chengdu610072,China）
Abstract：Baseonthecollapsecolumncharacteristicsandphysicalpropertiesofgeologicalfeatures,seismicresponsecharacteristicsofthecollapsecolumnwasanalyzedbyseismicnumericalsimulation,apracticedatawascollectedandancollapsecolumnwasinterpretedaccordingtothesecharacters.Theresultsshowedthat:thephysicalpropertiesdifferenceamongtheupward,internalandsurroundingofthecollapsecolumnleadtochangesinseismicwaves.OnthetopoftheCollapsecolumns,thelayersshowsslightlyorsignificantlysubsidencewithinformingconcavesurface,groundfissures.TheinnerlayeroftheCollapsecolumnsshowsobvioussubsidence,andthelowerP-wavevelocityanddensitycomparingwiththesurrounding.Forasingleshotrecord,weneedtoconsidertherelationshipbetweenconcavecurvatureandthedepthoftheinterface.IfthesourceislocatedinthecenteroftheConcaveinterface,thereisrotationwave,ifwesetshotandreceivertolocateatthecenteroftheconcaveinterface,wecanclearlyseethefocusreflectioninthesingleshotrecord.Iftheshot,belowtheconcavecenter,wecanseetheordinaryreflectedwave,whilethereflectedwavedelays.Forastackedseismicdata,ifthereisthecollapsecolumn,wecanobservethedifferentseismicresponsecharacteristicsindifferentlocations.OnthetopofthecollapseColumn,theenergyofseismicwavesshowsweak,thereflectedwavelooksInferior.TheinnerlayerofthecollapseColumnhasaconcavefeatures,wecanseering-shapedanomalyinthehorizontalslice.
Keywords：co