TY  - JOUR
ID  - epos1573
UR  - http://dx.doi.org/10.13168/AGG.2013.0014
IS  - 2 (170
A1  - Mutke, Grzegorz
N2  - In the article the results of registering seismic events located under mining coal seam are presented. Such mining tremors have occurred in several Polish mines. The geological and mining conditions affecting the induction of that type of seismic events are shown. The mechanisms of deep seismic events (more than 1000m) triggered by mining are discussed in relation to regional geology.  The most deep mining seismic events in Upper Silesia were related to regional geological structures focusing stress (e.g. syncline) or tectonic structures (younger faults), where mining stresses were only additional factor to trigger strong regional seismic events. The tremors were characterized by a shear mechanism in the source (double-couple forces). Tremors located directly under the performed operation, usually characterized by an uniaxial tension mechanism, associated with the regional tension axis and the space created during the operation of the coal seam, causing pushing loaded rock-mass into new gobs. 
Proposed methods of seismic monitoring for case of seismic 
events location under mining coal seam are discussed.
VL  - 10
TI  - Registrations of seismic foci under mining coal seam - the experience of Polish mines
AV  - none
EP  - 153
Y1  - 2013/06//
PB  - Academy of Sciences of the Czech Republic
JF  - Acta Geodynamica et Geomaterialia
KW  - depth of mining seismic events
KW  -  location and mechanism of mining tremors
SN  - 1214-9705
SP  - 147
ER  -