Rockburst induced ground motion—a comparative study

Zembaty, Zbigniew

doi:10.1016/j.soildyn.2003.10.001

Cited by 52 publications

(37 citation statements)

References 6 publications

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“…Parametrem, który wyraźnie odróżnia wstrząsy górnicze od trzęsień ziemi jest czas trwania intensywnej fazy przebiegów drgań [13,14]. W przypadku trzęsień ziemi ten czas wynosi 20 s i więcej, a w przypadku wstrząsów górni-czych 0,5 -2,5 s.…”

Section: Fale Powierzchniowe Epicentrumunclassified

Normalized response spectra from surface vibrations induced by mining tremors

Kuźniar¹,

Maciąg²,

Tatara³

2014

JCEEA

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Praca dotyczy jednego ze sposobów opisu informacji o wymuszeniu kinematycznym -za pomocą spektrów odpowiedzi. Przedstawiono w niej propozycję opracowanego wzorcowego (standardowego) przyśpieszeniowego spektrum odpowiedzi dla najbardziej aktywnego sejsmicznie obszaru górniczego w Polsce -Legnicko-Głogowskiego Okręgu Miedziowego (LGOM). Tego typu spektrum może być wykorzystane w analizach dynamicznych. Spektrum to wyznaczono na podstawie przebiegów drgań gruntu rejestrowanych za pomocą aparatury czuwającej w okresie kilku lat na trzech stanowiskach pomiarowych. W obliczeniach pod uwagę wzięto tylko wyselekcjonowane przebiegi drgań z amplitudami nie mniejszymi od 10cm/s2, łącznie kilkaset przebiegów drgań. Zestawienie uśrednionych bezwymiarowych przyśpieszeniowych spektrów odpowiedzi sporządzonych dla każdego ze stanowisk osobno, pozwoliło na wskazanie wpływu warunków gruntowych na postać otrzymywanego spektrum. Dokonano porównania zaproponowanego wzorcowego spektrum z odpowiednim spektrum zamieszczonym w literaturze, wykazując i analizując występujące różnice. Dodatkowo porównano krzywą wzorcową spektrum uzyskaną na podstawie drgań gruntu z zaproponowaną krzywą wzorcową spektrum od jednocześnie rejestrowanych drgań fundamentów budynków (trzech typów: niskiego, średniej wysokości i wysokiego), posadowionych obok ww. stacji pomiarowych na gruncie. Krzywe te istotnie się różnią i dowodzą silnego tłu-mienia drgań z wyższymi częstotliwościami przez budynki.

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Section: Fale Powierzchniowe Epicentrumunclassified

Normalized response spectra from surface vibrations induced by mining tremors

Kuźniar¹,

Maciąg²,

Tatara³

2014

JCEEA

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“…In a paper by Zembaty (2004) ground motions from rockbursts from a copper mining basin in Western Poland were analyzed in detail to define differences as well as similarities to earthquake records motions. Following the Johnston (1992) paper two, characteristic types of rockbursts were identified with respect to their surface records:…”

Section: Rockbursts and Measures Of Their Intensity On The Ground Surmentioning

confidence: 99%

“…When it comes to rockbursts the role of PGV still is important, particularly for the type I rockbursts (Zembaty 2004;Johnston 1992). Also for the type II rockbursts or natural earthquakes PGV can be employed as a measure of cracking damage for PGVs for dominant frequencies of 2-3 Hz and above.…”

Section: Rockbursts and Measures Of Their Intensity On The Ground Surmentioning

confidence: 99%

How to model rockburst seismic loads for civil engineering purposes?

Zembaty

2011

Bull Earthquake Eng

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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.

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“…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.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of an industrial RC tower

Tatara

Pachla

Kuboń

2016

Bull Earthquake Eng

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This study presents the results of analyses performed using a dynamic 3D model of a RC skip tower located at a coal mine in Poland. Kinematic excitation was based on acceleration records of a mining tremor (underground mining activity) and an earthquake. Although Poland is not a particularly active seismic region, there are regional seismic phenomena associated with mineral exploitation. These vibrations, generally connected with human activity, are so-called paraseismic events. Whilst mining-related surface vibrations show some similarities with natural earthquakes, there are also some differences. Dynamic calculations were performed in the time domain. Analysis of the results refers to the distribution of stresses and displacements which were compared to the limit values. An additional goal of the study was to examine the possibility of loss of structural stability and the risk of collapse. The reason for making the analysis was the fact that kinematic excitations of high structures had not been taken into account in the design procedure. Using actual recorded surface vibrations caused by rock burst and earthquake as kinematics loads allowed a comparison of the dynamic responses of the structure with two different seismic events.

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Rockburst induced ground motion—a comparative study

Cited by 52 publications

References 6 publications

Normalized response spectra from surface vibrations induced by mining tremors

Normalized response spectra from surface vibrations induced by mining tremors

How to model rockburst seismic loads for civil engineering purposes?

Experimental and numerical analysis of an industrial RC tower

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