Mutke, Grzegorz and Lurka, Adam and Zembaty, Zbigniew (2020) Prediction of rotational ground motion for mining-induced seismicity – Case study from Upper Silesian Coal Basin, Poland. Engineering Geology, 276. p. 105767. DOI: https://doi.org/10.1016/j.enggeo.2020.105767
Full text not available from this repository.Abstract
For decades, coal mining in the Upper Silesian Coal Basin (USCB) in Poland has been inducing annually more than 150 seismic events with local magnitude M > 2. Two sets of sensors were installed in the USCB in Poland to measure angular velocities and translational accelerations from seismic events induced by underground coal mining. In the period from December 2015 to November 2016, 503 seismic events were recorded with local magnitude M between 1.1 and 3.5. Analysis of measurement data for induced seismicity confirmed a strong linear correlation between peak ground acceleration of shear S-waves, PGA and peak ground motion of angular velocity, PRV. The observed correlation can be a result of previously observed coupling between the angular instantaneous velocity vector and the respective displacement vector at the ground surface. Three types of empirical equations for induced seismicity in Upper Silesia in Poland were developed to predict the peak rotational ground motion of the vertical (torsion), horizontal (rocking), and instantaneous 3D-xyz components. The prediction values of horizontal peak angular velocity ground motion indicate that for strong mining-induced seismic events in the USCB with a magnitude of M = 3.5, we can expect that the mean values of PRVH will reach 7.5 mrad/s in the epicentral area (r = 500 m) and with magnitude M = 4 respectively will reach 19.7 mrad/s. Such values of ground rotation may substantially contribute to the overall seismic response of civil infrastructure, particularly for tall buildings. The study of angular velocity ground motion is important not only from the cognitive point of view, but also from practical significance for assessing the seismic impact on very high buildings, chimneys and stability of slopes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Mining-induced seismicity, Rotational ground motion, Prediction equations, Mining seismology, Slope stability |
| Subjects: | Methodology > Method and procesing > Probabilistic seismic hazard analysis - stationary > Path and site effects Region > Poland > Upper Silesia Inducing technology > Underground mining |
| Project: | EPOS-PL > MUSE1 Regional Polygon: underground coal mining IS-EPOS project > USCB: Regional seismicity and ground motion associating underground coal mining EPOS-IP > USCB: Regional seismicity and ground motion associating underground coal mining |