超前预报反射界面位置特征的数值模拟和实际资料对比分析  

Numerical Simulation of Location Characteristics of Forecasting Reflecting Interface and Comparative Analysis on Actual Data

作　　者：卓启亮 宁刚[2] Zhuo Qiliang;Ning Gang(Zhejiang Geophysical and Geochemical Prospecting Academy,Hangzhou Zhejiang 310005,China;Geophysics Department of Gansu Exploration Institute of First Survey and Design Institute of China Railway,Lanzhou Gansu 730000,China)

机构地区：[1]浙江省地球物理地球化学勘查院,浙江杭州310005 [2]铁一院甘肃勘察院物探新技术研究所,甘肃兰州730000

出　　处：《工程地球物理学报》2018年第5期605-608,共4页Chinese Journal of Engineering Geophysics

摘　　要：在生产实践中很难采集到清晰的负反射数据,这使得很多人对地震地质超前预报技术的应用存在疑惑。本文利用二维声波有限差分方程正演得出了一个隧道超前预报模型的波场快照和单炮记录,通过对波场快照和单炮记录的分析,从理论上得出了负反射的基本特征以及负反射和界面位置的相对关系。通过对一组隧道超前预报实际数据的分析计算,证实了负反射确定界面位置的准确性,为超前预报利用原始资料进行分析提供重要参考。It is difficult to collect clear negative reflection data in practice, which makes many people wonder about the application of advanced prediction technology to the tunnel seismic. In this paper, two dimensional finite difference wave equation is used to derive a snapshot and a single shot record for a tunnel prediction model. Through analyzing the snapshot and single shot record, in theory the basic characteristics of the negative reflection is obtained and the relationship of the negative reflection and interface location is set up. Comparing with the numeral result, the correctness of the negative reflecting interface location is verified, which provides the important reference for advanced prediction in using raw data.

关 键 词：声波有限差分模拟 负反射 物理模拟 

分 类 号：P631.4[天文地球—地质矿产勘探]