Abstract: Inclined shaft tunnels have higher requirements for the stability of the surrounding rock mass, and at the same time, more accurate information is required at the supported excavations. The use of a single ground penetrating radar (GPR) will have certain deficiencies in the accuracy and effectiveness of the geological information prediction. Conventional radar data analysis includes time-depth conversion, but in the inclined tunnel, the face and the tunnel remain non-orthogonal. In the analysis, the depth after the time-depth conversion needs to be converted twice. In the Xianglushan inclined shaft tunnel project, through analyzing the rock mass instability and failure mechanism, this paper presents the results of using the combination of geological analysis and ground penetrating radar technology, as well as comprehensive advanced geological prediction analysis with complementary physical parameters, combined with the monitoring measurement in the inclined shaft tunnel. The monitored data were regression analyzed and a comprehensive data analysis for the stability of the surrounding rock mass was performed. Thee analyses provide background ground information for the design and construction of the inclined shaft tunnel.

Key words: Ground Penetrating Radar, Inclined Shaft Tunnel, Monitoring and Measurement, Regression Analysis