隧道反射地震法超前探测研究

隧道施工地质超前预报是在地下工程施工过程中,采用一些方法或手段预测掌子面前方一定范围内存在的不良地质体或地质界面的位置、性质和规模,为安全、快捷、持续施工采取防范措施提供可靠的依据。本文在详述隧道反射地震法超前探测原理的基础上,分析地下全空间情况下,震源与接收点之间的地震波场运动关系,讨论观测系统的优化设计方案,较全面地总结隧道反射地震法超前预报时距曲线规律。同时开发一套隧道反射地震法超前探测数据处理系统(TRSP1.0),该系统涵盖波形处理、正演模拟、成像处理和岩石动力学参数提取等功能模块,给出合理的处理流程。通过理论模型和实际数据测试验证,取得较理想的效果。

Study on Leading Tunnel Reflection Seismic Prediction

The leading seismic predication for tunnels is to predict by some means or methods the locations,characters and scales of unfavorable geological bodies or their boundaries in underground engineering construction and so to previde reliable basis for countermeasures to guarantee safe,quick and continous construction.This paper discusses the basic principles of the leading tunnel reflection seismic predication(TRSP),analyzes the characters of wave propagation,studies the optimum geometry system and summarizes the time-distance relations law of TRSP.A special data processing system named TRSP1.0 was developed,which includes function modules for wave form processing,forward numerical modeling targets imaging and extracting of lithologic parameters.Synthetic and real data have testified that good results may be acquired with this TRSP1.0.