Study On Combination Exploration Of Active And Passive Surface Wave Frequency Dispersion Curve For Shallow Surface Exploration

Because of its low cost,convenient operation and high resolution and strong energy,the surface wave exploration method has been widely used in the detection of the formation S-wave velocity structure.Based on the detailed analysis of the active and passive source surface wave exploration methods,this paper focuses on the study of the combined exploration methods of frequency dispersion curves under different conditions in shallow-level wave exploration,in order to widen the bandwidth of the frequency dispersion curve obtained by surface wave exploration,and to enhance the deep detection ability and shallow resolution.In this paper,the combination of frequency dispersion curves of different channel spacing surfaces in active source surface wave exploration is carried out,combined with the combined exploration surface wave dispersion curve of different main frequency geophone,and the detection research and effect analysis of the combination of primary and passive source surface wave exploration dispersion curve.The results show that the combined exploration of the main and passive source surface wave dispersion curves can effectively widen the frequency band width of the dispersion curve,improve the inversion depth of the S wave velocity structure,and maintain the resolution of the shallow velocity structure by combining the wave frequency dispersion curve combination of the active source and the surface wave dispersion curve of the active source combined geophone.