Analysis of induced seismic events in rockburst-hazardous Nikolaevsk deposit

Rasskazov, I. Yu.; Fedotova, Iuliia; Sydlyar, A.V.; Potapchuk, M. I.

doi:10.25018/0236-1493-2020-11-0-46-56

Cited by 4 publications

(3 citation statements)

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“…The displacement process develops unevenly over time, the periods of activation can occur many years after mining operations have been stopped [1,36]. The fault reactivation in these periods can manifest itself in a dynamic mode in the form of fault-slip rock bursts [34,37,38] or as seismic events [29,39,40], as a cycle of short-term rock deformations [41] or as a process lasting from 1 h to several weeks or even several years [33]. In the latter case, a lengthy process of massif deformation can also be represented as a pulsating one consisting of multitude of micro-shock-like displacements [31].…”

Section: Uneven Timing Of Fault Reactivation Processmentioning

confidence: 99%

Study of the Migrating Mine Gas Piston Effect during Reactivation of Tectonic Faults

Batugin,

Kobylkin,

Kolikov

et al. 2023

Applied Sciences

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The hypothesis of the piston effect during mine gas migration caused by fault reactivation was studied, with the use of computer modeling, to explain cases of a sudden appearance of mine gases on the earth surface in coal mining areas. The study is based on the factual data of the mode and amplitudes of subsidence along faults during mining, the morphology of the fault planes, and the theoretical ideas about the discrete nature of the fault wall displacement along uneven contact surfaces. It is taken into account that the walls of the fault, due to the asperity types “ridge” and “sag”, form contacts of the “ridge–ridge” and “ridge–sag” patterns. This study examines the situation where gas pressure in the fracture space can sharply increase due to the jerky displacement of reactivated tectonic fault walls with a rough fault plane. It is assumed that, in the first phase of reactivation, the fracture space expands as a result of the displacer opening and the fact that fault plane asperities engage in the “ridge–ridge” type of contact. With the subsequent relative displacement of the fault walls in the second phase of reactivation, the contact changes into the “ridge–sag” type and a sharp reduction in the fracture space volume occurs. It is shown that a “piston effect” emerges due to the reduction in fracture space and that it promotes an increase in gas pressure and stimulates gas movement to the surface through the available channels. The resulting “piston effects” may also be responsible for the suddenly raised gas content recorded in the air of surface structures and recurrent mine gas migration onto the surface. The findings expand our understanding of the sudden gasification of the earth surface and living spaces in coal mining areas and contribute to the understanding of the gas migration process, thereby helping to monitor hazards.

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Section: Uneven Timing Of Fault Reactivation Processmentioning

confidence: 99%

Study of the Migrating Mine Gas Piston Effect during Reactivation of Tectonic Faults

Batugin,

Kobylkin,

Kolikov

et al. 2023

Applied Sciences

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“…The seismicity associated with human engineering (man-made seismicity) is one of the current pressing global problems with technical, social and environmental aftermath. One of the classifications of man-made seismicity is the Adushkin-Turuntaev classification [Adushkin and Turuntaev, 2015], where seismic events arising self-arbitrarily in the rock mass containing and surrounding the area of its operation are attributed to induced Filling reservoirs [Carder, 1945;Dong et al, 2022;Gupta, 2002;Malekzade and Rokni, 2021] [ Nazarova, 2018;Nikolaev, 1973] Mining operations [Butler and Simser, 2017;Cook, 1966;He et al, 2012;Lizurek et al, 2015;Rong et al, 2021] [ Eremenko et al, 2017;Kozyrev et al, 2020;Petrov et al, 2021;Rasskazov et al, 2020] Development of hydrocarbon deposits [Liu et al, 2022;Nicholson and Wesson, 1992] [ Adushkin and Turuntaev, 2015;Punanova and Rodkin, 2022] Blasting [Dodge, 2018;Hamilton et al, 1972] [ Adushkin and Turuntaev, 2015;Gorbunova, 2021] Operation of UGS [Benetatos et al, 2013;Cesca et al, 2014;Tang et al, 2015] Not marked…”

Section: Introductionmentioning

confidence: 99%

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

Batugin

Ogadzhanov

Han

et al. 2022

Russian Journal of Earth Sciences

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Seismicity during UGS operation had not yet been known in Russia. This work presents studies on the manifestation of seismicity in the area of three underground gas storages (UGSs) located in the south-eastern part of the East European Platform (European part of Russia). The tectonic structure of this region, geodynamic conditions and technological characteristics of «Vostochnoye», «Zapadnoye», «Uzhnoye» UGS are presented. An analysis of the situation with the manifestation of seismicity allows us to conclude that it is technogenic in nature, a feature not previously noted on Russian UGSs. There is a wide list of signs indicating the relationship between the mode of operation of UGSs and the nature of seismicity: prior to the start of UGS operation technogenic seismicity in this area was not known; there is a clear correlation between UGS operation and seismicity; the epicenters of seismic phenomena are located in the geodynamic influence zone of the UGS; in the region there are Earth crustal faults that experienced activation in late Cenozoic time and respond to strong earthquakes of neighboring tectonic areas, which consequently indicates their predisposition to reactivation; the change in pressure in the UGS reservoir is sufficient to induce seismicity. The phenomenon of increasing seismic activity during the gas extraction period is noted, which is explained by the effect of softening of the containing massif and its subsequent push-like deformation when the gas pressure in the reservoir is reduced. Despite the weak seismicity, which does not pose a threat to UGS facilities and adjacent territories, it is proposed to include seismic observations in the complex geodynamic monitoring at Russian UGS to establish patterns over a long period of time.

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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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Analysis of induced seismic events in rockburst-hazardous Nikolaevsk deposit

Cited by 4 publications

References 0 publications

Study of the Migrating Mine Gas Piston Effect during Reactivation of Tectonic Faults

Study of the Migrating Mine Gas Piston Effect during Reactivation of Tectonic Faults

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

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

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