Detection of faults and hidden granites in metallic mine using ground penetrating radar tomography

Faults and hidden granites provide extreme challenges for mining and construction in metallic mine. Ground penetrating radar (GPR) technology, mainly used in detection of layers of medium, is restricted in exploration of metallic mine with complex geology structure using reflected wave. The purpose of this study is to develop the method to increase received signal intensity to improve resolution of detection result using velocity tomography. To verify the applicability of this method to rock masses, we perform simulation experiments. Representative models including complex stratification of different electromagnetic wave velocity is designed and Least Square QR (LSQR) algorithm is employed to resolve large sparse inversion equations. Analyses are performed from perspectives of both whole profiles and selected slides. The simulation results show that GPR velocity tomography is applicable to complex geology structures and gets better results in horizontal layered structure.