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Browsing by Author "Otsuki, K"

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Frequency–magnitude distribution of -3.7 < M(subW) < 1 mining-induced earthquakes around a mining front and b value invariance with post-blast time

Author: Naoi, M ; Nakatani, M ; Horiuchi, S ; Yabe ; Philipp, J ; Kgarume, Thabang E ; 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 Date: Oct 2014 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 of detecting AEs ... Read more
Steady activity of microfractures on geological faults loaded by mining stress

Author: Naoi, M ; Nakatani, M ; Otsuki, K ; Yabe, Y ; Kgarume, Thabang E ; Murakami, O ; Masakale, T ; Ribeiro, L ; Ward, A ; Moriya, H ; Kawakata, H ; Durrheim, R ; Ogasawara, H Date: May 2015 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 located several tens of ... Read more
Unexpectedly frequent occurrence of very small repeating earthquakes (5.1=Mw=3.6) in a South African gold mine: Implications for monitoring intraplate faults

Author: Naoi, M ; Nakatani, M ; Igarashi, T ; Otsuki, K ; Yabe, Y ; Kgarume, Thabang E ; Murakami, O ; Masakale, T ; Ribeiro, L ; Ward, AK ; Moriya, K ; Kawakata, H ; Nakao, S ; Durrheim, RJ ; Ogasawara, H Date: Dec 2015 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 analysis period, 45% ... Read more

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Browsing by Author "Otsuki, K"

Browsing by Author "Otsuki, K"

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