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Moment tensors of mining tremors - detection tool of the mode of rock-mass fracturing: mechanism of deep events on October 24 and October 12, 2005 in Moab Khotsong mine, S. Africa

SYSNO ASEP	0333934
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Moment tensors of mining tremors - detection tool of the mode of rock-mass fracturing: mechanism of deep events on October 24 and October 12, 2005 in Moab Khotsong mine, S. Africa
Author(s)	Šílený, Jan (GFU-E)_{ORCID, RID}
Source Title	Controlling seismic hazard and sustainable development of deep mines: 7th International symposium on rockburst and seismicity in mines (RASIM7), Vol. 1. - Paramus : Rinton Press, 2009 / Tang C. A. - ISBN 978-1-58949-058-1
Pages	s. 399-406
Number of pages	8 s.
Action	Controlling seismic hazard and sustainable development of deep mines /7./
Event date	21.08.2009-23.08.2009
VEvent location	Dalian
Country	CN - China
Event type	WRD
Language	eng - English
Country	US - United States
Keywords	moment tensors ; mining tremors ; Moab Khotsong mine
Subject RIV	DC - Siesmology, Volcanology, Earth Structure
R&D Projects	GA205/09/0724 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z30120515 - GFU-E (2005-2011)
UT WOS	000271028900060
Annotation	Contrary to natural earthquakes, where the features of the geological environ without void spaces and the character of loading naturally favor shear slip, in foci of seismic events induced by man-made activities there is a physically based reason for occurence of non-shear processes. Especially in mines, the existence of mined-out cavities enables implosive events which are improbable among natural earthquakes. In particular, great depth of excavation typically occurring in gold ore mining results in extreme loading of mine structures underground. High stress concentrations cause collapsing of excavated cavities, which is reflected by specific non-double-couple mechanisms. Apart from mining tremors, natural earthquakes of a tectonic origin may occur in the area where mining activity takes place.
Workplace	Geophysical Institute
Contact	Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028
Year of Publishing	2010

Number of the records: 1