不同勘探方法对浅层小断距隐伏断裂探测效果  

Detection Effects of Different Exploration Methods on Buried Faults with Small Fault Throw

作　　者：曾金艳[1,2] 李自红[1,2] 陈文 扈桂让[1,2] 闫小兵[1,2] ZENG Jinyan;LI Zihong;CHEN Wen;HU Guirang;YAN Xiaobing(Shanxi Earthquake Agency,69 Second Section of Jinci Road,Taiyuan 030021,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Jinci Town,Taiyuan 030025,China;Beijing Meichen Building Seismic Engineering Co Ltd,204 Shuanglongnanli,Beijing 100021,China)

机构地区：[1]山西省地震局,太原市030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,太原市030025 [3]北京美辰建筑抗震工程有限公司,北京市100021

出　　处：《大地测量与地球动力学》2024年第3期310-315,共6页Journal of Geodesy and Geodynamics

基　　金：山西省基础研究计划(20210302123361);山西太原大陆裂谷动力学国家野外科学观测研究站项目(NORSTY2022-01)。

摘　　要：采用浅层地震勘探、钻孔联合剖面勘探、槽探3种方法联合探测临汾盆地郭家庄断裂的空间位置,并研究其活动特征。结果表明,不同探测方法对断层信息的揭示存在很大差异,浅层地震勘探在探测具有一定断距的断层,同时地层存在一定物性差异的情况下能取得理想的效果,且不同的工作参数探测效果不相同;钻孔联合剖面勘探能提高对小断距断层的分辨率,但受地形及地层主观认别等因素的影响,可能会遗漏断距小、标识层薄的断层;槽探能较好地识别地表断层的微小断距,但受施工深度和施工条件影响。3种方法相结合,可以精确确定断裂的空间位置和活动特征。We investigate the spatial location of Guojiazhuang fault in Linfen basin and study its activity characteristics by shallow seismic exploration,composite drilling section exploration and trenching.The results show that there are great differences in the disclosure of fault information by different detection methods.The shallow seismic exploration can obtain ideal results when detecting faults with certain fault throw and certain physical property differences in the strata,and the detection effect varies with different working parameters.The composite drilling section exploration can improve the resolution of faults with small fault throw,but the faults with small fault throw and thin identification layer may be missed due to the subjective recognition of terrain and strata.The trenching can effectively identify the small fault throw of surface faults,but it is affected by construction depth and construction conditions.The combination of three methods can accurately determine the spatial location and activity characteristics of faults.

关 键 词：小断距 浅层地震勘探 钻孔联合剖面勘探 槽探 

分 类 号：P313[天文地球—固体地球物理学]