论文部分内容阅读
针对城市活断层浅层地震探测的一些技术问题,在兰州盆地的金城关断层和刘家堡断层沿线开展活断层浅层(50 m以内)地震勘探技术研究。主要采用纵波和横波多次覆盖共CMP点地震反射方法,获得了目标场地地震图像资料,尤其横波地震剖面更加清晰地反映出超浅层构造空间特征。以红艺村测线(HYC)和师范学校西测线(SFXX)为例,分析总结了数据采集、资料处理、剖面解释三方面浅层活断层地震探测的技术要点。结果可以为兰州市及类似复杂构造地区活断层地震调查提供技术参考。
Aiming at some technical problems of shallow seismic exploration of active fault in city, the seismic exploration technology of shallow active fault (within 50 m) is studied along Jinchengguan fault and Liujiapu fault in Lanzhou basin. The seismic data of the target site are obtained mainly by multiple longitudinal and transverse wave co-planar CMP methods. In particular, the shear wave seismic profile more clearly reflects the spatial characteristics of ultra-shallow structures. Taking the technique of HYC and SFXX as an example, this paper analyzes and summarizes the technical points of the seismic exploration of the shallow active faults in data acquisition, data processing and profile interpretation. The results can provide technical reference for seismic survey of active faults in Lanzhou City and other complicated structural areas.