<p>The blast-induced ground vibrations result from the combined effects of body waves (compressional and shear waves) and surface waves (Rayleigh waves). Understanding the propagation and evolution characteristics of seismic waves could provide new thoughts for controlling blast-induced vibrations. In an earlier work, the evolution of seismic waves induced by a kind of vertical single-blasthole was investigated using a polarization analysis approach. As a follow-up study, this paper extends to analyzing the seismic waves induced by contour blastholes (i.e., smooth and presplitting blastholes) based on two on-site experiments and numerical simulations. Then, the inherent mechanisms of different kinds of blastholes and predictions for seismic components are discussed in conjunction with our earlier work. The results indicate that the relative location of the source-to-site significantly influences the proportions of different seismic waves. Due to differences in source characteristics and attenuation laws, the dominant wave changes with the location and orientation of concerned points. For smooth blasting, only S- and R-waves propagate in the same plane as blastholes, while the influence of the P-wave is negligible. Horizontal vibrations are primarily caused by the R-wave, while the vertical vibrations result from both S- and R-waves. Additionally, presplitting blastholes exhibit similar mechanical mechanisms to smooth blastholes, as both belong to contour blastholes, and thus the seismic components they induced in the plane are the same. However, the P-wave motion outside the contour plane cannot be ignored, particularly along the orientation of the source-to-site.</p>