| Recently, as the rapid development of city construction, the application of engineering exploration has developed rapidly. In engineering exploration, the objects are shallow and the geological condition is complex, so it is necessary to develop an accurate method to simulate the seismic wave propagation in real media of subsurface in order to research the characteristics of shallow geological body. To increase the accuracy of seismic wave modeling, this paper uses high-order finite-difference of second-order in time and tenth-order in space to simulate and then analyze seismic wave characteristics based on the previous study.In engineering exploration, subsurface media are regarded as perfectly elastic and isotropy. Firstly, the theory of seismic wave numerical simulation and its application using high-order finite-difference method are introduced. Then the high-order finite-difference schemes of acoustic and elastic velocity-stress equation in perfectly elastic and isotropy media are derived using staggered-grid method. The paper simulates the geological models which will be encountered in engineering exploration using the acoustic wave equation and elastic wave equation respectively, and analyzes the characteristic of kinematics and dynamics such as reflection, refraction, transmission, diffraction and the attenuation of energy of seismic wave from the snapshots and shot-records produced from the simulation. The results show that the staggered-grid high-order finite-difference method can satisfy the demands of engineering with high accuracy and rapid computation.In the last part of paper, the models with real geological condition are created and then are simulated using the modeling method derived in the paper above to research the seismic wave propagation of subsurface. Then I analyze the seismic wave propagation characteristics of refraction, reflection and diffraction comparing with the collected data in order to increase the accuracy of interpretation.
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