洞室工程地震CT与VSP联合检测方法及应用实例

地震层析成像（CT）和垂直地震剖面（VSP）法一直作为两种完全分离的探测技术在勘探活动中运用,而洞室工程地震CT与VSP联合检测方法则是充分利用VSP和CT数据采集方式的兼容性,通过一体化观测系统参数设计和优化数据处理流程,将两种地震勘探手段融为一体而成为优化组合技术下的高分辨工程物探方法。方法实验结果表明,地震CT与VSP联合检测方法在近地表岩土工程勘查应用中几乎可以不增加野外工作费用,就能够同时获取地下洞室工程体施测区间内的地震CT数据和关于洞室轴向剖面方向的逆向VSP数据体。

Methods and applications of joint detection with cavity engineering seismic CT and VSP

Up to now, the Seismic Computerized Tomography(CT) method and Vertical Seismic Profile(VSP) method are two completely separated detection method used in exploration, but " the method of joint detection with cavity engineering seismic CT and VSP" may demonstrate the compatibility of VSP and CT data. Designing the process flow according to the integral layout parameters, these two methods can be fused as one with high resolution adopting the strategy above with practical examples, the seismic CT dataset of the subsurface cavity and reverse VSP dataset can be got in the axial profile direction of the cave at the same time, and the exploration cost can not be in creased. The datasets such as multi-offset reverse VSP gather can be developed at each receiving station and walk-away reverse VSP gather at each shot station.