Development of support system for large-scale underground structures using web 3D technology and RDBMS

Xu, Z.*; Yamachi, Hiroshi*; Sato, Toshinori; Matsui, Hiroya; Itakura, Kenichi*

Doboku Gakkai Rombunshu, F3 (Doboku Johogaku) (Internet), 71(1), p.43 - 55, 2015/10

In the process of underground space development, enormous information is collected in each developing stage, such as investigation, plan, design and construction. It is important to properly feed back these information to design and construction in order to realize rational design and construction of an underground space. And more, these information also become basic data in a plane of structure management. However, it is almost impossible that it is controlled in the individual ability, since collected information quantity is too enormous. For the purpose of intuitively controlling and processing these enormous information, we devised the system for the data management by freely moving in virtual reality space. In this paper, the basic structure of the system constructed by adopting WEB3D and RDBMS, is described, and the practicability is verified.

Survey and analytical studies on a "TAKANUKE" collapse mechanism for greatly deeper shafts (Contract research)

Kurosaki, Yukio*; Yamachi, Hiroshi*; Matsui, Hiroya

JAEA-Research 2008-066, 168 Pages, 2008/09

JAEA-Research-2008-066-1.pdf:21.59MB
JAEA-Research-2008-066-2.pdf:45.71MB
JAEA-Research-2008-066-3.pdf:18.64MB
JAEA-Research-2008-066-4.pdf:3.35MB

Mizunami underground research laboratory planned to excavate to 1000 m depth and now under construction. One of the most serious problems in a greatly deeper shaft is "TAKANUKE" collapse caused by slip movement of large discontinuities. In this report, we have conducted numerical studies using finite difference method in order to throw an objective light on a mechanism of TAKANUKE collapse. These studies show two different stress states in upper and lower side of large discontinuities. In order to evaluate a possibility of TAKANUKE collapse during MIZUNAMI main shaft sinking, we have conducted a particle body analysis as well. A fault with a high strike up to 79 degree, discovered in survey boring at MIZUNAMI site, has a low potential of TAKANUKE collapse during shaft sinking.

Study on a collapse mechanism of a junction between greatly deeper shaft and horizontal drifts (Contract research)

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.

Investigation on collapse mechanism of super-deep vertical shaft

Sakurai, Shunsuke*; Shimizu, Norikazu*; Akutagawa, Shinichi*; Yoshida, Hidenori*; Sato, Toshinori; Yamachi, Hiroshi*

Doboku Gakkai Rombunshu, F, 62(4), p.662 - 673, 2006/12

https://doi.org/10.2208/jscejf.62.662

Recent interests in the development of deep underground facilities have been drawing significant attention for the importance of vertical shafts at great depth. However, due to shrinkage of domestic coal production, any deep shafts in the order of 1000 m have not been constructed in more than 20 years. For the purposes of technical transfer and establishment of fundamentals for rational design method of vertical shafts, intensive literature review and interviews to engineers with relevant experiences were conducted. As the results, there are two distinctive modes of failure mechanism originated by the common cause, that is "takanuke" and lining failure due to unexpected earth pressure.

Study on numerical analysis for stability mechanism of rock mass around the shaft excavated by short-step shaft-sinking method

Yamachi, Hiroshi*; Yamada, Fumitaka*; Sato, Toshinori; Funatsu, Takahiro*; Shimizu, Norikazu*

no journal, , 

no abstracts in English

Development of design and execution support system using virtual reality system

Itakura, Kenichi*; Xu, Z.*; Sato, Toshinori; Yamachi, Hiroshi*

no journal, , 

no abstracts in English