三分量地震映像技术在浅层裂隙调查中的应用
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摘要
地震映像法在工程地质调查中应用广泛,三分量地震勘探技术能够获得丰富的地学信息。本文采用纵波激发,三分量检波器接收的三分量地震映像技术对某测区进行浅层裂隙调查试验。通过对三分量数据进行处理和解释,成果剖面特别是X分量上裂隙反映明显。裂隙的响应特征表现为同相轴的扭曲和错断。X分量的加入,弥补了Z分量对于某些方向裂隙的不敏感,增加了解释的可靠性。调查结果表明该方法用于浅层裂隙调查行之有效。
Seismic imaging method has been used widely in the investigation of engineering geology.We can obtain abundant geological information with the three-components seismic technique.In the paper we combine the P-wave source and three-component geophone to investigate the shallow fractures in the experimental area.After the data processing and interpretation,the fractures appear obviously in the seismic profiles,especially in X component.There is the phenomenon of distortion and faulting in the events.Because Z component is not sensitive to the fractures of some directions,the reliability of interpretation is increased by the addition of X component information.The result shows that the method is effective to the investigation of shallow fractures.
Seismic imaging method has been used widely in the investigation of engineering geology.We can obtain abundant geological information with the three-components seismic technique.In the paper we combine the P-wave source and three-component geophone to investigate the shallow fractures in the experimental area.After the data processing and interpretation,the fractures appear obviously in the seismic profiles,especially in X component.There is the phenomenon of distortion and faulting in the events.Because Z component is not sensitive to the fractures of some directions,the reliability of interpretation is increased by the addition of X component information.The result shows that the method is effective to the investigation of shallow fractures.
引文
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[2]单娜琳,程志平.地震映像法及其应用[J].桂林工学院学报,2003,23(1):36~40.
[3]刘江平,陈超,侯卫生.浅层地震映像法在堤坝无损检测中的应用[J].人民长江,2002,33(5):71~82.
[4]王万合,王晓柳,刘江平,等.地震映像法在某高速公路岩溶探测中的应用[J].工程地球物理学报,2007,4(2):141~145.
[5]黄中玉,孙建库,朱仕军,等.多分量地震技术[M].北京:石油工业出版社,2007.
[6]黄中玉.多分量勘探技术[J].勘探地球物理进展,2003,26(5~6):413~422.
[7]姚姚.多波地震勘探的发展历程和趋势展望[J].勘探地球物理进展,2005,28(3):169~173.
[8]刘国华,肖梅,李庆春.浅层三分量地震勘探技术在我国西部公路地下裂缝与陷穴调查中的应用[J].水文地质工程地质,2008,35(5):101~105.
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