Vibration effect of earthquakes in abandoned medieval mine

Lednická, Markéta; Kaláb, Zdeněk

doi:10.1007/s40328-013-0018-4

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…Since 2008, more than 2000 earthquakes from West Bohemia were recorded on JER1 station during three intensive seismic swarms in the years 2008, 2011, and 2014. The first analysis of vibration effect in the Jeroným Mine during these seismic swarms was described in the papers by Kaláb and Lednická (2011), Lednická and Kaláb (2013), Lyubushin et al (2014), and Kaláb et al (2015). According to the presented results, the measured vibration velocity values reached up to 0.8 mms í1 at JER1 station for an earthquake with local magnitude M L 3.6.…”

Section: Introductionmentioning

confidence: 79%

“…As mentioned above, first analysis of the data recorded at the permanent station JER1 during the seismic swarm in 2011 was presented by Lednická and Kaláb (2013) and the data analysis was focused especially on the evaluation of influence of near earthquakes on the stability of discussed mine. Data from the 2014 seismic swarm are still analysed.…”

Section: Discussionmentioning

confidence: 99%

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Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Lednická

Kaláb

2016

Acta Geophys.

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The shallow medieval Jeroným Mine is located at a distance of about 25 km southeast of the Nový Kostel focal zone where the most intensive seismic activity in West Bohemia (Czech Republic) has been documented. Permanent seismological monitoring has been carried out since 2004 in this mine. During the 2011 and 2014 seismic swarms, more than 1000 triggered records comprising almost 1500 earthquakes were recorded at the permanent station in the mine. Three short-term seismological experiments were accomplished during these swarms. Several temporary seismic stations were simultaneously placed in different parts of underground spaces which enabled comparison of vibration effect caused by near earthquakes in different parts of the mine. Although the depth of the lowest parts of mine is only about 60 m, a vibration effect generated by earthquakes from the Nový Kostel focal zone is not the same for the whole underground complex.

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Section: Introductionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Lednická

Kaláb

2016

Acta Geophys.

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“…Critical places from the viewpoint of vibration effect are fissured and weathered supporting pillars, hanging layers on the roof in chambers, and caving falls of rock leading into the chambers due to collapsed overburden. The mine is exploited, among other things, as a natural laboratory for geomechanical and geophysical experiments, for which a distributed monitoring system is used (for instance, Kaláb et al, 2010Kaláb et al, , 2011Lednická and Kaláb, 2013;Lyubushin et al, 2014;Kaláb and Lednická, 2016;Lednická and Kaláb, 2016a). Permanent seismic monitoring has been carried out since 2004 using a seismic station JER1, installed in the mine about 35 m below the surface in one of the largest chambers.…”

Section: Seismic Measurements In the Medieval Jeroným Minementioning

confidence: 99%

Influence of Vibration and Ground Deformation on Historic Structures: Case Study

2022

AMS

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When discussing historic structures, a significant problem is how to preserve and protect these structures. The presented paper deals with some issues of the unfavourable impact of industrial activity on some historic structures. Long-term influences from the industrial activity are one of the common sources of damage observed in these structures. Due to the size and volume of such structures, they are characterized by very low resistance to vibration and ground deformations. At the same time, the high cultural and material value of historic structures necessitates their costly protection and repair. Knowing the origin of problems, one may take proper actions to protect them. This paper discusses two important types of impact typical for industrial areas, especially affected by mining, seismically induced vibrations and continuous ground deformations from underground extraction. The presented discussion is based on the case study examples of historical sites located in some industrial areas in the Czech Republic and Poland. They point to different sources of damage to those structures that may arise as well as a combined effect of mining-induced seismic events and land subsidence. The medieval Jeroným Mine represents an underground structure loaded with natural and technical seismicity. The paper also includes a short overview of the process of seismic loading evaluation and basic information about historic structures with respect to seismic standards and land surface subsidence caused by underground mining.

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“…The Jeroným Mine is a shaft mine consisting of subsurface galleries, shafts and chambers spread across at least three horizontal levels ranging in depth from 10 to 50 m below the surface. Several recent papers have evaluated of structural stability of the mine (Froňka et al 2013;Lednická and Kaláb 2013;Kaláb and Lednická 2016; Fig. 1 The location of the Jeroným Mine on a map of the Czech Republic with recent photos of its access shafts and surroundings () photos: M. Rösnerová and Z. Kalab Lyubushin et al 2014).…”

Section: Geological Setting and Sample Locationsmentioning

confidence: 99%

Natural radioactivity of rocks from the historic Jeroným Mine in the Czech Republic

et al. 2021

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This study reports the natural radioactivity of characteristic rocks found in the historic Jeroným Mine of the Czech Republic as measured under the laboratory conditions. The rocks analyzed included granites and schists weathered to varying degrees and collected from different levels of the underground workings of the Jeroným Mine. The mine itself has been subject to metal extraction (mainly tin and tungsten) since the sixteenth century and has recently been developed as a cultural and scientific attraction open to the public. Activity concentrations of 40K, 232Th and 238U were measured from nine rock samples using gamma-ray spectrometry. The activity concentrations of 40K varied from 595 Bq kg−1 to 1244 Bq kg−1, while 232Th varied from 25 Bq kg−1 to 55 Bq kg−1. The activities associated with 238U ranged from 46 Bq kg−1 to 386 Bq kg−1. The measured activities were used to estimate two radiation hazard indices typically applied to building materials, the activity concentration index I and the external hazard index Hex. Mean respective values of 1.02 and 0.77 for I and Hex indicate that the rocks found in the Jeroným Mine meet radiological safety standards for building materials and do not pose a risk to potential tourists and staff.

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Vibration effect of earthquakes in abandoned medieval mine

Cited by 6 publications

References 8 publications

Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Influence of Vibration and Ground Deformation on Historic Structures: Case Study

Natural radioactivity of rocks from the historic Jeroným Mine in the Czech Republic

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