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Mechanical Properties of Abandoned and Closed Roadways in the Kushiro Coal Mine, Japan

IJRMMS Vol.48, No.4, pp.585-596 (2011).pdf1.48 MBPDF見る/開く

タイトル: Mechanical Properties of Abandoned and Closed Roadways in the Kushiro Coal Mine, Japan
著者: Yoshiaki, Fujii 著作を一覧する
Yoji, Ishijima 著作を一覧する
Yoshihisa, Ichihara 著作を一覧する
Tamotsu, Kiyama 著作を一覧する
Satoshi, Kumakura 著作を一覧する
Michihiko, Takada 著作を一覧する
Takayuki, Sugawara 著作を一覧する
Takashi, Narita 著作を一覧する
Jun-ichi, Kodama 著作を一覧する
Masataka, Sawada 著作を一覧する
Eiji, Nakata 著作を一覧する
キーワード: EDZ
Rayleigh wave velocity
Old roadways
Medium-hard clastic rocks
発行日: 2011年 6月
出版者: Elsevier
誌名: International Journal of Rock Mechanics and Mining Sciences
巻: 48
号: 4
開始ページ: 585
終了ページ: 596
出版社 DOI: 10.1016/j.ijrmms.2011.04.012
抄録: The objective of this research is to clarify the mechanical properties and self-healing ability of Excavation Damaged Zone (EDZ) around rock caverns in clastic rock. Observations of nearly 100 closed roadways up to 50 years old, which can be regarded as very severe EDZs with no initial sealability and are up to 300 m deep in clastic rock, were made at Kushiro Coal Mine, Japan, to accomplish the objective. Most old roadways were closed, though a few remain open. Closure of old roadways was mainly due to roof deflection and/or floor heave. Large plastic deformations dominated; however, severe fractures were seldom observed in closed old roadways. Rayleigh wave velocity and hydraulic conductivity in the closed old roadways were in the range of 0.3 - 1.2 km/s and 5 x 10^[-7] - 1 x 10^[-7]m/s, respectively, and those in EDZ and EdZ (Excavation disturbed Zone) around recently excavated roadways were 1.1 - 1.8 km/s and 1 x 10^[-8] - 5 x 10^[-8] m/s, respectively. The extent of EDZ around the present tailgate was in the range of 1 m to 5 m. Mechanical excavation and prevention from water are suggested as the key points for long-term maintenance of rock repositories. Pressurization from inside the cavern to decrease the permeability of EDZ is proposed for maintenance of rock repositories in medium-hard clastic rock masses at similar depths for long periods.
Relation (URI):
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 藤井 義明


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