The Wave Field Separation Numerical Simulation In Tunnel Seismic Pilot Forecast

Along with the national infrastructure investment in China, plus the growing is a mountainous country, tunnels, as a special kind of building structure was more and more attention. But because of its unique characteristic of concealment and unpredictability, making the geological advanced prediction influenced more and more attention. But the present the geological advanced prediction method to basically have seismic pilot forecast and electromagnetic wave advanced prediction method, which used the most advanced prediction of earthquake prediction is also widely, longest. So research in the tunnel of seismic wave field characteristic and correct the wave field separation method can make tunnel more accurate, advanced prediction for tunnel construction schedule and people's life and property provides a powerful guarantee for the role, and subsequent tunnel complex attributions of seismic wave field research has guiding significance to the inversion.This paper firstly by reflection time-distance curve equation deduced the tunnel influence of different perspectives on the fault ahead of reflection wave time-distance curve. And through the tunnel arch finite element model blowing up analysis of several kinds of wave field separation methods:Radon transformation and linear Radon transformation, hyperbolic parabola Radon transformation and f-k domain depending on the speed of the characteristics and their respective filter application scope.By establishing three different Angle reflex fault plane simulated seismic wave field, while environmental constraints when analyzed from relations through with Angle different, the seismic interpretation caused the error.In addition to the three model by the time-space domain original profile of the wave field separation, analyzes the Radon transformation and linear Radon transformation, hyperbolic parabola Radon transformation and f-k domain depending on the speed of the application scope, filter that Radon transformation and the parabola Radon transformation of linear combination of filtering method is a very precise ground game separation method.