Tohoku University

The University of Electro-communications

Japan Drilling Co., Ltd.

National University Corporation the University of Electro-communications

Shigehito Uetake

Toshio Kobayashi

Kazuyoshi Takayama

Kazuhisa Otomo

Ken-ichi Ueda

Ken-Ichi Ueda

An excavation technique for a stratum capable of excavating a submerged stratum such as a layer containing an underground resource by using laser irradiation in liquid is provided. In this technique, a laser beam transmitted through laser transmission meansis irradiated in liquidin form of a laser beam having a wavelength with high absorptance of the liquidby laser-induced bubble generation means, generating a bubble flow, thus excavation of a submerged stratum may be carried out by using a laser-induced destruction effect. Moreover, a laser beamhaving low absorptance of the liquidis irradiated by laser irradiation meansand passed through the bubble flow, thereby applying a thermal effect to a stratum to destroy rock and excavate the stratum. The destruction effect and the thermal effect also may be cooperatively worked.

Method and device for excavating submerged stratum

Growing community of inventors

Tokyo, Japan

Shigehito Uetake