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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 mapping method is widely used in engineering geological survey, and three-component seismic exploration technology can obtain rich geoscience information. In this paper, a three-component seismic imaging technique of longitudinal wave excitation and three-component geophone is used to conduct shallow fracture investigation of a survey area. By processing and interpreting the three-component data, the fractures in the profile section, especially the X-component, are clearly reflected. The response of fractures is characterized by twisting and breaking of the events. The addition of the X component compensates for the insensitivity of the Z component to fractures in some directions and increases the reliability of interpretation. The survey results show that this method is effective for shallow fracture investigation.