Title: APPLICATION OF NEWLY DEVELOPED ROTATIONAL SENSOR FOR MONITORING OF MINING INDUCED SEISMIC EVENTS IN THE KARVINA REGION |
Authors: Kaláb Zdeněk, Knejzlík Jaromír and Lednická Markéta |
DOI: 10.13168/AGG.2013.0020 |
Journal: Acta Geodynamica et Geomaterialia, Vol. 10, No. 2 (170), Prague 2013 |
Full Text: PDF file (2.4 MB) |
Keywords: rotational ground motion, rotational sensor, seismic monitoring, mining induced seismicity |
Abstract: Classical Russian pendulum seismometer S-5-S was modified for recording of the rotational components of ground motion
around the vertical or horizontal axes; the modified sensor is denoted here as S-5-SR. Experimental field testing of the S-5-SR
sensor started in December 2010 in the Karvina coal region that is known as an area of intensive mining induced seismicity.
First seismic station was installed in Doubrava village characterized by thick sedimentary layers. Next seismic station was
installed in Orlova village, in different local geological conditions, i.e. in region without sedimentary layers. More than
200 mining induced seismic events were recorded on each seismic station during the period of six months of seismic
monitoring. The recorded wave patterns confirm the existence of rotational ground motion components in this region; the
strongest recorded value of this component exceeded 1 mrad.s-1. Analysis of the obtained records is presented in this paper. |