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Browsing by Author "Murakami, O"

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  • Naoi, M; Nakatani, M; Horiuchi, S; Yabe; Philipp, J; Kgarume, T; Morema, G; Khambule, S; Masakele, T; Ribeiro, L; Miyakawa, K; Watanabe, A; Otsuki, K; Moriya, H; Murakami, O; Kawakata, H; Yoshimitsu, N; Ward, A; Durrheim, R; Ogasawara, H (Springer Basel, 2014-10)
    The authors investigated frequency-magnitude distribution (FMD) of acoustic emissions (AE) occurring near an active mining front in a South African gold mine, using a catalog developed from an AE network, which is capable ...
  • Durrheim, RJ; Ogasawara, H; Nakatani, M; Yabe, Y; Milev, AM; Cichowicz, A; Kawakata, H; Moriya, H; Naoi, M; Kgarume, T; Murakami, O (South African Geophysical Association, 2013-10)
    Mining-induced earthquakes pose a risk to workers in deep mines, while natural earthquakes pose a risk to people living close to plate boundaries and even in stable continental regions. A 5-year Japan-SA collaborative ...
  • Durrheim, RJ; Ogasawara, H; Nakatani, M; Yabe, Y; Milev, AM; Cichowicz, A; Kawakata, H; Moriya, H; Naoi, M; Kgarume, T; Murakami, O (South African Geophysical Association, 2013-10)
    Mining-induced earthquakes pose a risk to workers in deep mines, while natural earthquakes pose a risk to people living close to plate boundaries and even in stable continental regions. A 5-year Japan-SA collaborative ...
  • Ogasawara, H; Nakatani, T; Durrheim, RJ; Naoi, M; Yabe, Y; Moriya, H; Hofmann, GF; Stander, C; Roberts, DP; de Bruin, P; Oelofse, J; Kato, H; Cichowicz, A; Birch, D; Ngobeni, D; Milev, A; Kgarume, T; Satoh, T; Horiuchi, S; Kawakata, H; Murakami, O; Yoshimitsu, N; Ward, AK; Wienand, J; Lenegan, P; Yilmaz, H; Mngadi, S; Piper, PS; Clements, TN; Nakao, S; Okubo, M; Ishii, H; Visser, AV (Australian Centre for Geomechanics, 2014-09)
    A multi-disciplinary study of the response of the rock mass to mining and mining-induced earthquakes has been conducted in six gold mines in South Africa at sites deeper than 3 km, or with equivalent stress. More than 80 ...
  • Naoi, M; Nakatani, M; Otsuki, K; Yabe, Y; Kgarume, TE; Murakami, O; Masakale, T; Ribeiro, L; Ward, A; Moriya, H; Kawakata, H; Durrheim, R; Ogasawara, H (Elsevier, 2015-05)
    Acoustic Emissions (AE) down to MW ~ –4 were recorded at a site 1 km beneath the surface in the Cooke 4 Mine, South Africa. Several planar AE clusters with lateral extent of 10–100 m were identified. Most of them were ...
  • Naoi, M; Nakatani, M; Igarashi, T; Otsuki, K; Yabe, Y; Kgarume, TE; Murakami, O; Masakale, T; Ribeiro, L; Ward, AK; Moriya, K; Kawakata, H; Nakao, S; Durrheim, RJ; Ogasawara, H (American Geophysical Union, 2015-12)
    The authors observed very small repeating earthquakes with -5.1 = Mw = -3.6 on a geological fault at 1 km depth in a gold mine in South Africa. Of the 851 acoustic emissions that occurred on the fault during the 2 month ...