TGS360超前地质预报正演模拟及应用

Forward modeling and application of TGS360 advanced geological prediction

隧道超前地质预报是对施工掌子面前方地质情况进行探测,预报掌子面前方不良地质体的位置、产状及其围岩结构的完整性与含水的可能性。超前地质预报常用的物探方法有很多,随着物探设备探测精度的提高,解译、解释技术的发展,近些年来出现和引进了很多弹性波类的超前地质预报方法(如TSP、TRT、TGS360等)。这里利用Tesseral2D正演软件对典型不良地质情况进行建模,用TGS360处理软件对正演数据进行了反演和解译分析,总结了数据处理、解译的初步经验。利用该方法对临沧某开挖公路隧道进行了超前地质预报探测,预报结果与现场开挖验证情况较为吻合,为今后TGS360超前预报法在公路预报中的应用提供借鉴。

Tunnel advance geological forecast is to detect the geological conditions in front of the construction face,and it is used to predict the location of the unfavorable geological body in front of the face and the possibility of the integrity and water content of the surrounding rock structure.There are many geophysical methods commonly used in advance geological prediction.With the improvement of detection accuracy of geophysical prospecting equipment and the development of interpretation and interpretation technology,many advanced geophysical prediction methods of elastic wave appeared and have been introduced in recent years,such as TSP,TRT,TGS360 and so on.In this paper,Tesseral2D forward modeling software is used to model the typical adverse geological conditions.TGS360 processing software is used to invert and interpret forward data,and preliminary experience in data processing and interpretation is summarized.These methods are used to carry out advanced geological forecast detection of an expressway tunnel in Lincang City,and the forecast results are in good agreement with the field excavation verification.This provides reference for the application of TGS360 advanced forecast method in road forecast in the future.