3D estimation of water-permeable fractures using full polarimetric MIMO borehole radar and demonstration experiment

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04969
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 31020:Earth resource engineering, Energy sciences-related
• Research Institution: Osaka Electro-Communication University
• Principal Investigator: EBIHARA Satoshi 大阪電気通信大学, 工学部, 教授 (20301046)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ボアホールレーダ / 地中レーダ / アレーアンテナ

Outline of Final Research Achievements

We developed a full polarimetric radar for estimating 3D distribution and evaluated its performance at a university experiment site. Furthermore, we applied this radar to outdoor experiments. In conclusion, we found that the developed borehole radar has the expected performance as a polarimetric radar. This result suggests that the borehole radar may obtain not only the 3D position of an object but also information on the shape of fractures and faults. For example, in the geological disposal of radioactive waste, not only is it necessary to estimate the position of faults, but detailed information such as permeability is also required. This suggests that the borehole radar may be used in such applications with further research.

Free Research Field

地下電磁波計測工学

Academic Significance and Societal Importance of the Research Achievements

放射性廃棄物の地層処分ではき裂や断層を位置推定するだけでなく、透水性などの詳細な情報が必要である。今後、研究を進めることで、本研究で開発したボアホールレーダがこのような応用の場で使用できることを示唆している。