TETSP在隧洞超前地质预报中的应用  

Application of TETSP in tunnel advance geological prediction

作　　者：吴海洋[1,2] WU Haiyang(Chongqing Survey Institute,Chongqing 400020,China;Technology Innovation Center for Spatio-temporal Information and Equipment of Intelligent City,Ministry of Natural Resources,Chongqing 401120,China)

机构地区：[1]重庆市勘测院,重庆400020 [2]自然资源部智能城市时空信息与装备工程技术创新中心,重庆401120

出　　处：《物探化探计算技术》2024年第4期403-409,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41641040)。

摘　　要：笔者介绍了一种隧洞长距离预报地震反射成像系统TETSP,将TETSP与TSP303用于某配水工程隧洞超前地质预报,展示了TETSP观测系统布置方式及数据处理流程,阐述了TETSP在检波器耦合方式及声波干扰压制方面与TSP303的差异,对比了两者原始信号的特性,分析了强溶蚀区岩体对应地震反射异常规律,隧洞实际开挖结果验证了TSP303与TETSP预报的可靠性。结果表明:两种地震反射技术均能较好地探测掌子面前方岩体波阻抗存在显著差异的界面,偏移剖面反射界面集中以及纵横波波速偏低的区域对应岩体质量差。TETSP检波器灵敏度与数据噪比较TSP303更高,但TSP303数据处理软件相对更成熟,故预报准确度更高。This paper introduces a tunnel long-distance prediction seismic reflection imaging system,TETSP,which is used for advanced geological prediction of a water distribution project tunnel with TSP303.The layout and data processing process of the TETSP observation system are introduced,and the differences between TETSP and TSP303 in terms of detector coupling and acoustic interference suppression are explained.The characteristics of the original signals are compared,and the reflection anomaly law corresponding to the strong dissolution zone of the rock mass is analyzed;the actual excavation results of the tunnel have verified the reliability of TSP303 and TETSP predictions.The results show that both seismic reflection techniques can effectively detect interfaces with significant differences in wave impedance of the rock mass in front of the palm.Secondly,areas with concentrated reflection interfaces in offset profiles and low longitudinal and transverse wave velocities correspond to poor rock mass quality.Thirdly,TETSP detector sensitivity and data noise ratio TSP303 is higher,but TSP303 data processing software is relatively more mature and,therefore has higher prediction accuracy.

关 键 词：TETSP TSP303 千岛湖配水工程 超前地质预报 

分 类 号：TV221.2[水利工程—水工结构工程]