METHOD FOR DETECTING UNDERGROUND TUNNEL USING GRAVITY GRADIENT DATA

摘要

The present invention relates to a method for determining a location and a direction of a subsurface void or a tunnel using gravity gradient data obtained by a gravity gradiometer. According to the present invention, provided is the method for detecting the underground tunnel using the gravity gradient data, which is configured to be able to extract the direction of the tunnel using the characteristics of the gravity gradient with the gravity gradient data obtained by a single sideline on the earth, by being configured to locate the tunnel automatically from an assembly of a tunnel-direction vector induced at several measurement points, after obtaining the direction vector toward the tunnel at the ground measurement point using gravity gradient components.