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Journal Articles

Phase transition and domain formation in ferroaxial crystals

Hayashida, Takeshi*; Uemura, Yohei*; Kimura, Kenta*; Matsuoka, Satoshi*; Hagihara, Masato; Hirose, Sakyo*; Morioka, Hitoshi*; Hasegawa, Tatsuo*; Kimura, Tsuyoshi*

Physical Review Materials (Internet), 5(12), p.124409_1 - 124409_10, 2021/12

Journal Articles

A Study on support design for deep shaft sinking in rock masses of low strength and anisotropic initial stress

Motoshima, Takayuki*; Koike, Masashi*; Hagihara, Takeshi*; Aoyagi, Kazuhei

Dai-46-Kai Gamban Rikigaku Ni Kansuru Shimpojiumu Koenshu (CD-ROM), p.208 - 213, 2019/01

The short step construction method is the standard construction method for deep shaft excavation. However, considering the shaft construction in the sedimentary rock widely distributed in Japan, the support concrete stress can become excessive especially when there are bad conditions such as low rock strength, anisotropic initial stress, or high ground pressure. In this research, we introduced the dual support design to the short step construction method in order to reduce the support stress, and confirmed the validity by three dimensional numerical analysis. Validation analysis was conducted using the in-situ data in the Horonobe Underground Research Project conducted by Japan Atomic Energy Agency.

Journal Articles

Estimation of in situ stress based on the measurement of convergence during gallery excavation

Aoyagi, Kazuhei; Kamemura, Katsumi*; Sugawara, Kentaro*; Hagihara, Takeshi*

Dai-53-Kai Jiban Kogaku Kenkyu Happyokai Happyo Koenshu (DVD-ROM), p.11 - 12, 2018/07

no abstracts in English

Journal Articles

Gas control measures taken during deep shaft excavation

Nago, Makito*; Hagihara, Takeshi*; Minamide, Masashi*; Motoshima, Takayuki*; Jin, Kazumi; Kudo, Hajime; Sugita, Yutaka; Miura, Yoichi*

Dai-49-Kai Zenkoku Kensetsugyo Rodo Saigai Boshi Taikai Kenkyu Rombunshu (CD-ROM), p.77 - 80, 2012/10

This paper presents measures against gas emission during deep shaft excavation in the Horonobe Underground Research Laboratory Project (Horonobe URL Project). The gas control measures taken in the Horonobe URL Project include the following: (1) determination of the amount of methane contained in surrounding strata and groundwater, and gas concentration based on preliminary investigations, (2) determination of the specifications of fans, dust collectors, and ducts through ventilation network analysis (simulation), (3) reduction of methane gas emission through the use of waterproofing grout, (4) prohibition on the use of internal-combustion engine and the adoption of explosion-proof equipment, (5) development of methane gas control system, and (6) monitoring of methane gas emission. (3) to (6) described above are performed daily in the safety management activities and described in detail in this paper. The ventilation and eastern access shafts have currently reached a depth of 290 m and 250 m, respectively. The emission of methane gas has been observed to rise 0.3 % to 1.3 % in the fault zone, and it is controlled appropriately according to the gas control measures described above. As the measure to reduce the methane gas concentration, monitoring is confirmed to be effective.

Journal Articles

Effects of shaking time on boron leachability

Kojima, Wataru; Yamakami, Mitsunori; Fujikawa, Daisuke; Kitagawa, Yoshito*; Hagihara, Takeshi*; Saito, Ryosuke*

Doboku Gakkai Heisei-20-Nendo Zenkoku Taikai Dai-63-Kai Nenji Gakujutsu Koenkai Koen Rombunshu, p.455 - 456, 2008/09

no abstracts in English

Oral presentation

Monitoring for chemical property of muck from deep shaft

Yamanishi, Takeshi; Sekiya, Yoshitomo; Suzuki, Tatsuya; Ito, Seiji; Kitagawa, Yoshito*; Hagihara, Takeshi*; Doi, Takashi*; Saito, Ryosuke*

no journal, , 

no abstracts in English

Oral presentation

Analysis of shaft construction cyclic time at Horonobe Underground Research Laboratory Project

Kitagawa, Yoshito*; Yamazaki, Masanao; Hagihara, Takeshi*; Minamide, Masashi*; Sekiya, Yoshitomo

no journal, , 

no abstracts in English

Oral presentation

A Study of the segment length of the concrete shaft lining using the short step method

Hagihara, Takeshi*; Koike, Masashi*; Sekiya, Yoshitomo*; Itabashi, Hideharu; Ohara, Masatsugu

no journal, , 

no abstracts in English

Oral presentation

A Plan of countermeasures against collapse in shaft sinking at great depth in soft sedimentary rock

Hagihara, Takeshi*; Nago, Makito*; Minamide, Masashi*; Ogawa, Hiroyuki*; Uyama, Mikinori*; Demma, keisuke*; Kisu, Yoshio*; Morimoto, Tsutomu*; Kudo, Hajime; Tsusaka, Kimikazu

no journal, , 

no abstracts in English

Oral presentation

A Result of countermeasures against collapse in shaft sinking at great depth in soft sedimentary rock

Minamide, Masashi*; Hagihara, Takeshi*; Nago, Makito*; Ogawa, Hiroyuki*; Uyama, Mikinori*; Demma, keisuke*; Kisu, Yoshio*; Morimoto, Tsutomu*; Kudo, Hajime; Tsusaka, Kimikazu

no journal, , 

no abstracts in English

Oral presentation

Shaft sinking at great depth in soft sedimentary rock

Hagihara, Takeshi*; Nago, Makito*; Kudo, Hajime; Tsusaka, Kimikazu

no journal, , 

no abstracts in English

Oral presentation

A Effect of receiving bolt against collapse in shaft sinking at great depth in soft sedimentary rock

Hagihara, Takeshi*; Minamide, Masashi*; Nago, Makito*; Ogawa, Hiroyuki*; Uyama, Mikinori*; Kisu, Yoshio*; Morimoto, Tsutomu*; Kudo, Hajime; Tsusaka, Kimikazu

no journal, , 

no abstracts in English

Oral presentation

Mechanism and countermeasure of crack in the concrete liner for a shaft in soft sedimentary rock

Minamide, Masashi*; Hagihara, Takeshi*; Nago, Makito*; Ogawa, Hiroyuki*; Uyama, Mikinori*; Kisu, Yoshio*; Morimoto, Tsutomu*; Yabuki, Yoshio*; Kudo, Hajime; Inagaki, Daisuke; et al.

no journal, , 

no abstracts in English

Oral presentation

Observational construction method for construction of the Horonobe Underground Research Laboratory

Minamide, Masashi*; Kudo, Hajime; Tsusaka, Kimikazu; Hagihara, Takeshi*; Ogawa, Hiroyuki*; Morimoto, Tsutomu*; Yabuki, Yoshio*; Nago, Makito*

no journal, , 

no abstracts in English

Oral presentation

A Study of shaft sinking against fault at great depth in soft sedimentary rock

Inagaki, Daisuke; Tsusaka, Kimikazu; Aoyagi, Kazuhei; Hagihara, Takeshi*; Nago, Makito*; Minamide, Masashi*; Ijiri, Yuji*

no journal, , 

no abstracts in English

15 (Records 1-15 displayed on this page)
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