TGS360Pro数据处理中波速对预报结果的影响及其改进措施

Influence of Wave Velocity on Prediction Results in TGS360 Pro Data Processing and Its Improvement Measures

掌子面前方围岩波速预测是隧洞超前地质预报的核心问题之一,波速预测的正确与否直接影响着预报结果的有效性和精度。本文围绕俄罗斯超前地质预报系统TGS360 Pro(tunnel geology survey 360 Pro,以下简称TGS)技术,分析波速对预报结果的影响,并根据预报结果与隧洞开挖后工程验证结果进行比对分析,提出TGS技术数据处理解译过程中波速选取的方法,有效地提高了TGS超前地质预报技术对掌子面前方异常体识别和定位的准确度。结果表明:在经验波速范围内,用速度结果曲线作为预测速度模型修正的依据可以获得与实际情况比较一致的预测波速值,是提高TGS超前地质预报技术准确度的一种有效手段。

The prediction of the wave velocity of the surrounding rock in front of the tunnel face is one of core problems of the prediction results.The correctness of the wave velocity prediction directly affects the validity and accuracy of the prediction results.This paper focuses on the technology of the Russian advanced geological prediction system TGS360 Pro(tunnel geology survey 360 Pro,hereinafter referred to as TGS),analyzes the impact of wave velocity on the prediction results,and proposes the method of wave velocity selection in the process of TGS technical data processing and interpretation based on the comparative analysis of the prediction results and the engineering verification results after tunnel excavation.It effectively improves the accuracy of TGS advance geological prediction technology in identifying and locating the anomalies in front of the tunnel face.The results show that within the range of empirical wave velocity,using the velocity result curve as the basis for the correction of the prediction velocity model can obtain the predicted wave velocity value that is more consistent with the actual situation,which is an effective means to improve the accuracy of TGS advance geological prediction technology.