摘要
地质超前预报能够对地下洞室前方围岩的不良地质情况进行及时预测,以达到提前预防、及时发现、及时处理、降低工程风险之目的,反射地震预报技术能够有效地使用反射地震信号预报隧道掌子面前方的地质情况,得到了广泛的应用。介绍了TGS360Pro与TRT7000两种反射地震超前地质预报系统的工作原理、工作方法,对两种系统在测试和成果输出方面进行了详细对比,并针对同一掌子面同时测试、分析,在开挖过程中实时跟踪开挖情况。通过对比,表明两种预报系统均能探测得到开挖前方的地质异常体(如断层破碎带、渗水、溶蚀裂隙等)。经开挖验证,预报结果与实际揭露情况基本相符,但也存在一定区别,可为以后进行类似的工作提供借鉴。
Advanced geological prediction can timely predict the adverse geological conditions of surrounding rock in front of underground caverns,so as to achieve the purpose of advanced prevention,timely discovery and treatment and reduction of engineering risks.The reflective seismic prediction technique can effectively use the reflected seismic signal to predict the geological situation in front of the tunnel face,which has been widely used.This paper introduces the working principles and methods of TGS360Pro and TRT7000 advanced geological prediction systems,makes a detailed comparison between the two systems in terms of testing and results output,simultaneously tests and analyzes the same face,and tracks the excavation situation in real time during the excavation process.Through comparison,it shows that the two prediction systems can detect the geological abnormal bodies(such as fault fracture zone,seepage,dissolution and corrosion fracture,etc.)in front of the excavation.The well excavation verifies that the predicted results are basically consistent with the actual exposure,but there are some differences,which can provide reference for similar work in the future.
作者
颜英军
李钰强
王海涛
Yan Yingjun;Li Yuqiang;Wang Haitao(Northwest Engineering Corporation Limited, China Power Construction Group, Xi′an Shanxi 710065, China)
出处
《工程地球物理学报》
2021年第1期59-66,共8页
Chinese Journal of Engineering Geophysics
