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深度500m研究アクセス北坑道におけるボーリング調査報告書(13MI38号孔$$sim$$13MI44号孔)

Results of borehole investigation in -500m access/research gallery-north (13MI38$$sim$$13MI44 Boreholes)

長谷川 隆; 川本 康司; 山田 信人; 大貫 賢二; 大森 一秋; 竹内 竜史; 岩月 輝希; 佐藤 稔紀

Hasegawa, Takashi; Kawamoto, Koji; Yamada, Nobuto; Onuki, Kenji; Omori, Kazuaki; Takeuchi, Ryuji; Iwatsuki, Teruki; Sato, Toshinori

本報告書は、瑞浪超深地層研究所の深度500m研究アクセス北坑道におけるボーリング(13MI38号孔: 掘削長102.10mabh、13MI39号孔: 掘削長16.40mabh、13MI40号孔: 掘削長16.60mabh、13MI41号孔: 掘削長16.60mabh、13MI42号孔: 掘削長11.55mabh、13MI43号孔: 掘削長11.60mabh、13MI44号孔: 掘削長11.67mabh)の調査により得られた地質学的、水理学的、地球化学的データ(岩盤等級、湧水箇所、湧水量、湧水圧、透水係数等)と、各ボーリング孔に設置した観測装置(岩盤変位計、地下水の水圧・水質モニタリング装置)の概要を取りまとめたものである。

The geological, hydraulic and geochemical data such as rock mass classification, groundwater inflow points and the volume, water pressure, and hydraulic conductivity were obtained from boreholes (13MI38$$sim$$13MI44) in the -500m Access/Research Gallery-North of Mizunami Underground Research laboratory (MIU). In addition to data acquisition, monitoring systems were installed to observe hydrochemical changes in the groundwater, and rock strain during and after the groundwater recovery experiment.

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