Abstract：Research purposes: In railway exploration process，we are often caught by bad geological factors such as goaf，softlayer，etc． Under these unfavorable geological conditions，the seismic imaging method is an effective exploration method． The complexity of subsurface collection determines the complexity of the seismic wave field． The difficult of data interpretation and anomaly discrimination leads to the method fails sometimes． To differentiate effective signal and inter- ference signals can improves the accuracy of data interpretation．
Research conclusions:With the actual physical parameters，we effectively simulated the seismic imaging profile． On modeling profile，we can see a significant geophysical anomaly，effectively reflecting the complex structure of the wave field in the shape and characteristics． The finite － difference numerical simulation method allows speed to change vertical- ly and laterally，and better used on actual model． It’s effective for modeling common － offset profile． Through research， we can more accurately determine the anomaly location and shape，and improve the exploring precision． It has a certain significance to the interpretation of actual work．
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2012, Vol. 29 
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