Tunnel face forward exploration system and tunnel face forward ground exploration method

摘要

PROBLEM TO BE SOLVED: To provide a tunnel face forward exploration system and a tunnel face forward exploration method capable of carrying out highly accurate and highly reliable tunnel face forward exploration. SOLUTION: While drilling a hole in front of a tunnel face with an excavation bit, bit vibration generated from the excavation bit is continuously transmitted at two points of a vibration receiver installed near the face and a pilot sensor arranged near the excavation bit. A tunnel face forward exploration system that receives vibrations and calculates the elastic wave velocity in front of the face based on the information of the two points that received the vibration. Along with the arrangement, a vibration sensor mechanism including the pilot sensor and a sensor case for accommodating the pilot sensor is arranged on the back side of the vibration generating mechanism, and the vibration sensor mechanism is installed at the tip of the excavation rod. It is characterized by that. [Selection diagram] Fig. 1