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Kurosaki, Yukio*; Yamachi, Hiroshi*; Katsunuma, Yoshio*; Nakata, Masao*; Kuwahara, Hideki*; Yamada, Fumitaka*; Matsushita, Kiyoshi*; Sato, Toshinori*
JAEA-Research 2008-048, 274 Pages, 2008/03
JAEA-Research-2008-048.pdf:10.93MB
A junction space between a super deep shaft and horizontal drifts forms a 3-dimensional geo-structure, which would take a complicated mechanical behavior during a junction excavation. However, a quantitative design method for a deep junction has not yet established. In order to examine a collapse mechanism of super deep shaft junction, we have conducted literature surveys and interview studies concerned with a collapses. Considering the results of investigations with reviews of intellectuals, the collapse mechanism depends on both a construction procedure of shaft junction and a geological condition. On the other hand, where a deep junction intersects faults and/or fractures with a large angle, a collapse called taka-nuke may occur and a numerical studies that can simulate a practical rock mass behavior around a shaft junction should be carry out. We demonstrate finite difference method is most adequate for these simulations with intellectual review.
Katsunuma, Yoshio*; Higuchi, Masanori*; Shiba, Akihiro*; Kataigi, Isao*
JNC TJ7410 2005-011, 64 Pages, 2004/02
JNC-TJ7410-2005-011.PDF:14.94MB
no abstracts in English
Katsunuma, Yoshio*; Nakata, Masao*; Nagano, Yuji*; Higuchi, Masanori*
JNC TJ7410 2005-004, 213 Pages, 2002/03
JNC-TJ7410-2005-004.PDF:10.22MB
no abstracts in English
Katsunuma, Yoshio*; Nakata, Masao*; Higuchi, Masanori*; Kataigi, Isao*
JNC TJ7410 2005-015, 261 Pages, 2001/03
JNC-TJ7410-2005-015.PDF:10.91MB
no abstracts in English