Response Spectra of Ground Motions and Building Foundation Vibrations Excited by Rockbursts in the LGC Region

Abstract

Surface vibrations induced by mining rockbursts resulting from underground exploitation in the mines in western Poland were analyzed and classified into three different categories. Comparison of the accelerograms simultaneously recorded on the ground and on the foundations of typical buildings, as well as the response spectra determined on the basis of these records, leads to the conclusion that ground vibration characteristics have a significant influence on the nature of vibration transmission from the ground to the building foundation. Analysis of the response spectra, separately determined from both ground vibrations and building foundation vibrations, indicates that the standard response spectrum based on building foundation vibrations is more useful in the design of new buildings in areas of mining tremors than the spectrum based on ground vibrations. Moreover, the usefulness of the models of soil-structure interaction based on seismic data in California was investigated with respect to mine-induced rockbursts in Poland.

Impact Assessment of Epicentre Distances and Energies of Mining Shocks on the Transmission of Free-Field Vibrations to the Building Foundations

“…Fundamental frequencies of natural vibrations (f 1 ) experimentally determined in horizontal directions of the buildings are equal respectively: 2.9-3.3 Hz in a direction parallel to the transverse axis (x) and 2.9-3.1 Hz in a direction parallel to the longitudinal axis (y) in the case of building M, as well as 1.44-1.50 Hz in a direction parallel to the transverse axis (x) and 2.06-2.17 Hz in a direction parallel to the longitudinal axis (y) in the case of building H [1].…”

“…Comparison of the response spectra curves obtained on the basis of mining origin vibrations simultaneously recorded on free-field near the buildings and on building foundations allows for analysis of the one of the soil structure interaction effects -vibration transmission from the ground to the building foundations [1,6,7].…”

“…A comparison of a huge number of records of accelerations of vibrations induced by mining tremors measured at the same time on the ground near the building and on the building foundation level leads to conclusion that they can differ significantly [1].…”

Approximate classification of mining tremors harmfulness based on free-field and building foundation vibrations

“…Mining tremors have been observed in many countries all over the world. These phenomena refer to underground exploitation of coal, copper, and gold mines in China, Australia, South Africa, Canada, India, France, Czech Republic, Russia, and Poland [1]. They are random events with respect to their time, place and magnitude, as with earthquakes.…”

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].…”