How to model rockburst seismic loads for civil engineering purposes?

Abstract

Usually rockbursts from underground mining induce minor quakes of MM intensity up to V. Sometimes however the surface tremors reach level of MM epicentral intensity I 0 = VI to VIII. Since a fast industrial development often takes place in the mining areas then some seismic design rules for new buildings are needed. The main obstacle is then lack of respective design response spectrum and an unclear definition of the level of design acceleration to apply. Particularly the latter one is difficult to overcome because the rockburst ground motion records differ from natural earthquakes when it comes to their spectral properties as well as return periods. This paper presents a method how to rationally define the design acceleration so that a seismic code, e,g, Eurocode 8, can be applied in practical design procedures in the mining areas.

SSA 2012 Annual Meeting Announcement

“…These issues include the incorporation of: (1) source directivity, (2) ground motion directionality, (3) vertical ground motions; (4) over 30, 000 small-magnitude (5.5 ≥ M ≥ 3.0) recordings; (5) additional moderate and large magnitude (M ≥ 6.0) recordings from around the world that occurred through 2011, (6) spectral damping, (7) epistemic uncertainty, and (8) improved site-response characterization. In addition, some of the more important improvements and enhancements we have made to our GMPE include: (1) a better method for incorporating magnitude saturation in the prediction of near-source large-magnitude ground motions, (2) incorporation of hypocentral depth as a parameter, (3) incorporation of depth to bedrock as a parameter in the shallow site response (Vs30) term, (4) additional and improved estimates of the depth to the 2.5 km velocity horizon (i.e., deep site and basin response), (5) additional spectral periods for a smoother predicted response spectrum, and (6) incorporation of an anelastic attenuation term for a more reliable extrapolation to large distances.…”

“…The first utilizes 416 stations in Japan's GEONET during the 2003 Mw 8. 3 Tokachi-Oki earthquake about 100 km offshore Hokkaido Island, the second investigates the 2010 Mw 7.2 El Mayor-Cucapah earthquake recorded by 95 stations in the California Real Time Network and the final one examines the 2011 Mw 9.0 Tohoku-Oki earthquake recorded by over 800 stations in GEONET. We leverage the improved accuracy of the combined GPS/accelerometer data to rapidly compute magnitude through scaling between the hypocentral distance, moment magnitude and the initial slip parallel displacements a few seconds after the P-wave arrival.…”

“…Consequently, the finite-difference (FD) modeling of 30 s time window in the frequency range [0. 3,6 ] Hz was heavily depending on the computational efficiency of the applied finite-difference scheme. The key aspect of the efficiency was the use of a discontinuous staggered grid for the 4th-order velocity-stress scheme.…”

The acceleration response spectra for legnica-glogow

“…5; 25, p. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The issues related to induced seismicity are known and remain valid [7; 17, [28][29][30][31][32][33][34][35][36][37]. Recently, the impact of induced seismicity has been a source of rising scientific and public concern, taking into account the growing needs to develop new methods for the exploration and exploitation of georesources, e.g.…”

Experimental and numerical analysis of an industrial RC tower

“…In Poland, there are regions of large paraseismic activity caused by underground mining exploitation. Among particularly active regions are: the Upper Silesian Coal Basin (USCB) (Tatara 2012); the LegnickoGłogowski Copper Region (LGCR) (Pytel 2003;Tatara and Pachla 2010a, b ;Zembaty 2004Zembaty , 2011Tatara 2012;Kuźniar and Tatara 2015;Maciag et al 2016) and the Bełcha-towski Brown Coal Region (BBCR) (Tatara and Pachla 2010a, b;Tatara 2012). In many cases, the structures situated in these areas were neither designed for nor verified for additional seis-mic loads resulting from buildings vibrations.…”