Study on engineering technologies in the Mizunami Underground Research Laboratory; FY2012 (Contract research)

Fukaya, Masaaki*; Noda, Masaru*; Hata, Koji*; Takeda, Yoshinori*; Akiyoshi, Kenji*; Ishizeki, Yoshikazu*; Kaneda, Tsutomu*; Sato, Shin*; Shibata, Chihoko*; Ueda, Tadashi*; et al.

JAEA-Technology 2014-019, 495 Pages, 2014/08

JAEA-Technology-2014-019.pdf:82.23MB

The researches on engineering technology in the Mizunami Underground Research Laboratory (MIU) plan consists of (1) research on engineering technology deep underground, and (2) research on engineering technology as a basis of geological disposal. The former research is mainly aimed in this study, which is categorized in (a) development of design and construction planning technologies, (b) development of construction technologies, (c) development of countermeasure technologies, and (d) development of technologies for security. In this study, the researches on engineering technology are being conducted in these four categories by using data measured during construction as a part of the second phase of the MIU plan.

Evaluation of the applicability of a new quantitative rock mass classification method at the Mizunami Underground Research Laboratory

Kuji, Masayoshi*; Asai, Hideaki*; Hashizume, Shigeru; Horiuchi, Yasuharu; Sato, Toshinori; Matsui, Hiroya

JAEA-Technology 2013-022, 72 Pages, 2013/10

JAEA-Technology-2013-022.pdf:5.3MB

Rock mass classifications are used for design and construction of underground structures. However, the classification methods commonly used in Japan are qualitative and inadequate for estimating the actual mechanical properties of a rock mass based on site specific geological features. Considering the design, construction and safe operation of large underground facilities, an important requirement is to utilize a rock mass classification method that can estimate site specific rock mechanical properties based on surface-based investigations and geological observations during excavation. For this study, a new quantitative rock mass classification method based on JGS standard was proposed and applied to the sedimentary formations and the granite at MIU. The results were compared with the rock mass classification system developed by CRIEPI and commonly used in JAPAN. Then the applicability of the new rock mass classification could be evaluated.

Study on dynamic behavior of a shaft excavated through faulted crystalline rock mass

Hashizume, Shigeru; Matsui, Hiroya; Horiuchi, Yasuharu; Hata, Koji*; Akiyoshi, Kenji*; Sato, Shin*; Shibata, Chihoko*; Niunoya, Sumio*; Noda, Masaru*

Dai-13-Kai Iwa No Rikigaku Kokunai Shimpojiumu Koen Rombunshu (CD-ROM), p.121 - 126, 2013/01

The "Mizunami Underground Research Laboratory" has been studying and developing engineering technology for deep underground applications. These applications are multifaceted and are categorized as development of design and construction planning technology, development construction technology, development countermeasure technology, and development of technology for construction and operation security. In this report, the dynamic stability of shaft and surrounding rock mass has been studied with respect to rock mass displacement and stress, the effect of using a concrete liner and excavating through faulted crystalline rock.

Examination concerning application of ACROSS to engineering technology of the MIU Project; Final report

Hasegawa, Ken; Kunitomo, Takahiro; Hashizume, Shigeru; Horiuchi, Yasuharu; Matsui, Hiroya

JAEA-Evaluation 2012-001, 117 Pages, 2012/07

JAEA-Evaluation-2012-001.pdf:15.47MB

ACROSS has been developed to acquire the detailed information on the tectonically active zone. The technology developed here, the transmission and reception technique, the data analysis and the interpretation technique of the ACROSS signal for example, is able to use in seismology but also in other fields. We considered the ACROSS technology may apply to the engineering technology of the MIU project, for example, to the geological environment monitoring around the shafts and the strength assessment of the shaft concrete lining. Its examination was made in the three years period from fiscal year 2007 to 2009. However, it was concluded that we required another two years of observation to evaluate the applicability of the ACROSS as a technology to monitor the geological environment around the shafts and research galleries. In this report, we describe the evaluation result of the ACROSS based on the data observed by the end of 2011.

Research on durability of crack detection using optical fibar sensor at Mizunami Underground Research Laboratory

Hashizume, Shigeru; Sato, Toshinori; Horiuchi, Yasuharu; Sueyoshi, Yoshitoshi*; Sano, Tadashi*; Hirai, Kazuhide*

no journal, , 

no abstracts in English