In order to study the influence of a complex filling body on the propagation characteristics of blasting seismic waves,blasting vibration data have been recorded on the monitoring points placed in the stopes on both sides of a filling body at -370 m level in Jiguanzui mining area of Hubei Sanxin Gold and Copper Mine.The signal analysis method,Hilbert-Huang transform(HHT) is used to analyze the changes of blasting seismic waves before and after propagating through the filling body from the perspective of marginal spectrum and transient energy spectrum.Furthermore,ANSYS/LS-DYNA numerical simulation is used to study the changes of maximum principal stress in the rock mass before and after the blasting seismic waves propagate through the filling body.The results show that the dominant frequency range of the blast vibrations before and after passing through the filling body are 60~80 Hz and 50~60 Hz,respectively.This indicates that the filling body has an effect of filtering high frequency contents.The energy accumulated in the frequency band 60~80 Hz after propagating through the filling body has attenuated to about 1/7 of that before propagating through the filling body.In addition,the energy distribution becomes more diffuse.Moreover,the maximum instantaneous energy of the seismic waves before propagating through the filling body is about 27 times that after propagating through the filling body.Although the blasting seismic waves reduce the maximum effective stress in the rock mass by about 14%,the stopes on both sides of the filling body still can generally keep stable.