3D shear wave velocity inversion with passive seismic surface wave in a mineral exploration
Passive seismic exploration based on seismic interferometry,utilizing the collection of natural noise signals for imaging,requires no active excitation,offering a low-cost and environmentally friendly approach.Widely used in engineering,mineral exploration and other fields,and has been developed rapidly.In this paper,a passive seismic surface wave imaging study was carried out in a mining area in Shandong province.A circular array of receivers was deployed for data acquisition.After preprocessing steps such as detrending,mean removal,and amplitude removal,cross-correlation calculations were performed for all station pairs.Filtering and noise reduction were applied to enhance the signal-to-noise ratio of the cross-correlation results.Subsequently,the two-station method was used to extract the dispersion curves of the station pairs,and the direct inversion method was used to directly invert all the dispersion curves of the mixed path to obtain the 3D shear wave velocity structure,which better reflected the bedrock and internal structures in the detection area.It provides basic data for further mineral exploration in this area.
Mineral explorationPassive seismicAmbient noiseTwo-station methodThree-dimensional inversion
万方数据
维普
