Share, Pieter Ewald and Milev, Alexander M. and Durrheim, Raymond J. and Kuijpers, J. and Ogasawara, Hiroshi (2013) Relating high-resolution tilt measurements to the source displacement of an M2.2 event located at Mponeng gold mine. Journal of the Southern African Institute of Mining and Metallurgy, 113 (10).
Full text not available from this repository.Abstract
As part of JAGUARS (JApanese-German Underground Acoustic emission Research in South Africa), high-resolution tiltmeters were installed during 2007 at Mponeng gold mine, South Africa, in an attempt to study and understand the risks posed by in-mine seismic events and to subsequently use the knowledge gained to mitigate these risks. In December 2007, an M2.2 event occurred at Mponeng and was detected by the tiltmeters installed. The tilt expected for the M2.2 event is modelled through the use of numerical and analytical tools and utilizing, as input parameters, characteristics of the event such as the rupture area, the amount of slip, elastic properties of the rock, the state of stress before the event occurred, and frictional parameters of the rupture. The calculated tilt values are correlated and compared with the recorded data, and are found to be of the same order. Certain input parameters, such as the initial rupture point, are further constrained by varying them, during modelling, until the calculated and observed tilt values are approximately equal. From modelling, it can be concluded that the rupture point had to be closer to the location of the tiltmeters. In addition, possible locations acting as source areas for the observed aftertilt are determined. Further modelling still needs to be done to quantify the effects of the tunnel close to the tiltmeters and plastic deformation of the rock mass. © The Southern African Institute of Mining and Metallurgy, 2013.
[error in script]| Item Type: | Article |
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| Uncontrolled Keywords: | high-resolution tilt data, Mponeng gold mine, M 2.2 seismic event, analytical modeling, numerical modeling, rupture plane |
| Subjects: | Region > South Africa Inducing technology > Underground mining |
| Project: | Geo-INQUIRE > JAGUARS: Mining induced seismicity associated to gold mining |
