巷道超前探测散射成像处理技术

国内外在隧道施工过程中已开始应用反射波法超前探测前方小构造,如断层、陷落柱.由于前方的断层面、陷落柱界面起伏不平,所以接收到的反射波能量较弱,难以精确成像,而基了惠更斯原理的散射成像方法能充分利用地震信号的全波场信息,具有较好的偏移成像效果,散射成像为巷道超前探测提供了一种可行的成像方法.笔者通过建立巷道超前探测模型,分析了散射成像处理技术的效果,验证了散射成像方法应用于巷道超前探测的可行性.

THE STUDY OF SCATTERED TO TOPOGRAPHY METHOD IN TSP

At home and abroad, during the process of the channel tunnel construction, TSP has been used to detect small structures such as fault, collapse column . Because the fault plane and collapse column interface is undulating, the received energy of the reflected wave is weak, therefore it is difficult to image ahead of the tunnel. The scattered topography method based on Huygens-Fresnel principle can take full advantage of the information of the full wave field seismic signals. Scattered wave offers a new image method for TSP due to the good migration effect. In this particle, Building exploring tunnel model to study the effect of scattered topography, and prove the feasibility of the scattered topography used in the TSP.