Hypothesis of strong seismic event origin in Rasvumchorr Mine on January 9, 2018

Kozyrev, A. A.; Semenova, I. E.; Zhuravleva, O. G.; Panteleev, Alexey

doi:10.25018/0236-1493-2018-12-0-74-83

Cited by 11 publications

(7 citation statements)

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“…The effect generated by blasting on seismicity can be of two kinds: long-term impact due to softening of faults as a consequence of blasting [4] and short-term impact in the form of increased seismicity for a certain time and in a certain vicinity of the hypocenter [5][6][7][8][9]. The latter effect is similar to the main shock-aftershocks pattern, with explosion to play the role of the main shock [6,7], and attenuation of seismicity with time proceeds in accordance with the Omori-Utsu law [10,11].…”

Section: Udc 550348mentioning

confidence: 99%

Seismic productivity of blasts: A case-study of the Khibiny Massif

Baranov¹,

Zhukova²,

Korchak³

et al. 2020

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The authors study the property of production-scale blasts to induce seismic events classified as micro shocks, rock bursts and earthquakes caused by sudden slips along faults. The study area is the production performance zone of Apatit’s Kirovsk Branch. It is situated in the southeast of the Khibiny Massif on the Kola Peninsula and is subjected to continuous autonomous seismicity monitoring. The subject of the research is the production blasts and seismic events recorded by the seismic monitoring station of Apatit’s Kirovsk Branch between January 1996 and June 2019. Blasting-induced seismic events were identified using the nearest neighbor method and the seismicity-dependent proximity function of the space–time–magnitude (energy), calculated with respect to the blasts. The threshold of the proximity function to assume a seismic event as the blast-induced event was selected using the model-independent method of seismic catalog randomization. It is shown that the number of blasting-induced seismic events—blasting productivity—obeys an exponential distribution irrespective of magnitudes or occurrence depths of the studied events. The obtained result conforms with the earlier determined productivity law for natural earthquakes on a global and regional scale, as well as for mining-induced seismicity in the Khibiny Massif. Accordingly, the productivity distribution is governed by the properties of a medium and is independent of the source mechanism of a triggering event (explosion, seismicity). The paper presents the research findings supported by the Russian Foundation for Basic Research, Project No. 19-05-00812, and in the framework of State Contract No. 007-00186-18-00 with the Kola Branch of the Geophysical Service of the Russian Academy of Sciences.

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Section: Udc 550348mentioning

confidence: 99%

Seismic productivity of blasts: A case-study of the Khibiny Massif

Baranov¹,

Zhukova²,

Korchak³

et al. 2020

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“…The long-term existence of the rockburst problem indicates its complexity and multifactoriality. Different researchers continue studies in the field of integrated rockburst hazard provision [7,8], trigger mechanisms and development of appropriate classifications [9,10]; seismological studies [11,12] and monitoring [13,14]; and studies of influencing factors [15,16] and rock behavior in zones of critical stress [17].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Surface Water Seepage on Seismicity and Rockbursting in Mines

et al. 2022

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Retrospective analysis of data obtained from long-term monitoring of technogenic seismicity and rockbursts at the Apatitovy Tsirk and the Rasvumchorr Plateau deposits (Russia) showed that there is a significant (by 50% or more) increase in the number of geodynamic events during spring snowmelt periods. An upswing of seismic activity within this rock massif occurs when following conditions are true: water reserve in the snow cover on the deposit area is more than 3 × 108 m3; snowmelt period exceeds 40 days; increase in water ingress rates continues for over 5 days and total water inflow volume exceeds the previous daily measurements by at least a factor of 2. Seismic activity of the massif starts to intensify after the snowmelt develops momentum. Major induced earthquakes occurred in the years when these conditions were met (for example, in 2005 there was a magnitude 2.3 earthquake; in 2009, M = 1.6 earthquake), and more than 1000 seismic events were recorded during the snowmelt period. It has been established that when mining reaches the depths of more than 500 m, seismic events during infiltration of atmospheric precipitation begin to occur from a depth of 100–200 m and are recorded to depths of about 900 m. A possible controlling factor of the seismic activation is the reactivation of tectonic faults, which occurs under conditions of the critically stressed state of the massif, due to a decrease in their normal compression during infiltration. Retrospective analysis of the factors contributing to a strong rockburst (K = 10–11) in 1990 at a bauxite mine in the South Urals shows that prior to this disaster there was an inrush of the Ai River waters into the mine workings through a large tectonic disturbance, which has not been previously taken into account when analyzing the mechanism of this geodynamic event. The intrusion of water into the fault located in the field of regional stresses and subsequent partial relief of its fault plane from normal stresses could have triggered the rockburst with fault-slip mechanism. The study of the relationship between amount of precipitation and the degree of water encroachment into the field, on the one hand, and seismicity, on the other hand, is needed to draw up recommendations on improving geodynamic and environmental safety of mining regions in order to ensure their sustainable development.

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“…Mineral extraction in the tectonically loaded rock masses causes manmade seismicity (e.g., (Adushkin, 2013;2016;Kozyrev et al, 2018;Adushkin et al, 2020)). In this case, rock pressure in the underground workings of the operating mines disrupts the continuity of the rock mass including its near-contour part which manifests itself in the dynamic forms as peelingoff and shooting of rocks, dynamic culling, microimpacts and rock bursts and manmade earthquakes (Kozyrev et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…In this case, rock pressure in the underground workings of the operating mines disrupts the continuity of the rock mass including its near-contour part which manifests itself in the dynamic forms as peelingoff and shooting of rocks, dynamic culling, microimpacts and rock bursts and manmade earthquakes (Kozyrev et al, 2016). Just as the tectonic (natural) seismicity, mining-induced earthquakes can trigger repeated shocks (aftershocks) (Plenkers et al, 2010;Woodward and Wesseloo, 2015;Kozyrev et al, 2018;Baranov et al, 2019a;. After a mining-induced earthquake, a decision should be rapidly made as to suspending the work, evacuating the people, and removing the equipment from the danger zone.…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution of Triggered Earthquakes in the Conditions of Mining-Induced Seismicity

Baranov

Motorin²,

Shebalin

2021

Izv., Phys. Solid Earth

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Abstract—The spatial distribution of the triggered seismic events in mining conditions in the tectonically loaded rock masses is studied using the example of seismicity in the Khibiny Mountains. It is shown that the distribution of distances from the triggering to triggered events, on average, obeys the power-law with a parameter independent of the magnitude of the triggering event. The model of the maximum distances from a triggering event’s hypocenter to the triggered shocks expected with a given probability is derived. It is shown that the model is consistent with the real data. Based on the error diagram analysis, the guidelines are proposed for the practical use of the model.

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Hypothesis of strong seismic event origin in Rasvumchorr Mine on January 9, 2018

Cited by 11 publications

References 0 publications

Seismic productivity of blasts: A case-study of the Khibiny Massif

Seismic productivity of blasts: A case-study of the Khibiny Massif

The Impact of Surface Water Seepage on Seismicity and Rockbursting in Mines

Spatial Distribution of Triggered Earthquakes in the Conditions of Mining-Induced Seismicity

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