Analyze of anomalous characteristics of advanced focused detection with DC resistivity in tunnel

In tunnel advanced detection, it will use FEM and physical experiment to simulate the anomalous characteristics of the new DC resistivity method of focus-current. Firstly, the principle and electrode arrangement will be introduced in the paper. Secondly, it makes an analog calculation to several relatively typical geoelectric models which apply the finite element method with solving anomalous potential for resistivity. And then, the experiment would testify the result of the calculation program with experimental-anagogic method. Finally, we make a special effort to investigate and study the features of advanced focused detection with DC resistivity in tunnel. The result shows that the method can reflect the anomaly obviously, and can be more effective to avoid the influence caused by side anomalies and construction machinery in tunnel. It has the characteristic that directional observation function, strong anti-jamming ability and real-time interpreted.