Laws of spreading and operational evaluation procedure for induced seismicity in mines and in mining areas

Yakovlev, D. V.; Tsirel, S. V.; Mulev, S. N.

doi:10.1134/s1062739116020369

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…As for rock-tectonic bumps and technogenic earthquakes, the foci of the former are located directly in mine workings, causing significant destruction of underground geomechanical structurespillars and mine workings [39]- [42]. Tectonic earthquake, like any other earthquake or rock-tectonic bump, may well result in seismic vibrations on the surface.…”

Section: Introductionmentioning

confidence: 99%

Predicting the magnitude of technogenic earthquakes during underground mining of the Zhezkazgan ore field

Khuangan,

Asainov,

Khojayev

et al. 2024

Min. miner. depos.

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Purpose. Determining a relationship between the shear/failure of the rock mass and the technogenic earthquakes caused by them during underground mining of ore deposits with the derivation of an equation for the dependence of the technogenic earthquake indicators for the conditions of the Zhezkazgan copper-ore field. Methods. The research methodology consists of studying and analyzing early research on technogenic earthquakes by the method of statistical data processing. Calculation of rock mass deformation distribution in the study area is based on numerical modeling in the Comsol Multiphysics 5.6 and MATLAB 2020 software package environment. Calculations are performed based on solving a plane problem using the Finite Element Method (FEM). Findings. Based on the transition from the failure area to subsidence and shear values of the overlying rock mass stratum, an equation for the dependence of the earthquake magnitude on the numerical values of the mass subsidence or shear has been obtained. Originality. For the first time, based on the physics and geomechanics of rock mass shear processes, empirical-analytical formulas have been obtained that make it possible to predict the technogenic earthquake magnitude during underground mining of ore deposits in the conditions of the Zhezkazgan copper-ore field. Practical implications. Preliminary predictive calculations made by the obtained formulas for the conditions of the active mine No. 31 of the East-Zhezkazgan mine, ТОО Kazakhmys Smelting, show acceptable results of magnitude value, comparable to in-situ measurements during field mining. This prediction makes it possible to pre-calculate the technogenic earthquake magnitude at the stage of designing mining operations and make appropriate scientifically sound decisions during further mining of the field.

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Section: Introductionmentioning

confidence: 99%

Predicting the magnitude of technogenic earthquakes during underground mining of the Zhezkazgan ore field

Khuangan,

Asainov,

Khojayev

et al. 2024

Min. miner. depos.

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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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“…However, active studies of the relationship between dynamic processes in rocks and EMPs just began in the twenty-first century [11][12][13][14], wherein the physical and methodological basics for predicting rock bumps were developed [15,16]. Even the equipment that allows the performance of local assessment of the massif strength by the minimum and maximum values of the amplitudes of the recorded electrical pulses within a given time interval and by the magnitude of the relative distribution of the amplitudes of the recorded electromagnetic pulses without their frequency accounted for was recently produced.…”

Section: Introductionmentioning

confidence: 99%

Specific Features of Mapping Large Discontinuous Faults by the Method of Electromagnetic Emission

2020

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In this paper, the authors consider the issue of processing the data of electromagnetic pulses (EMPs) recorded in mine workings and their interpretation. The Sami fault (Russia, the Murmansk region) was chosen as the object of the research. A number of experiments, including measuring the EMP level along the fault and the analysis of the results, were performed by the authors. The paper also presents a previously unconsidered method of transition from geological concepts to electro-technical ones, the aim of which is to identify the dependences of the amplitude of electromagnetic field anomalies on the parameters of active tectonic disturbances. The authors assumed the dependence of the amplitude of anomalies on the geological parameters of the rock mass and the thickness of the tectonic disturbance.

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Laws of spreading and operational evaluation procedure for induced seismicity in mines and in mining areas

Cited by 4 publications

References 12 publications

Predicting the magnitude of technogenic earthquakes during underground mining of the Zhezkazgan ore field

Predicting the magnitude of technogenic earthquakes during underground mining of the Zhezkazgan ore field

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

Specific Features of Mapping Large Discontinuous Faults by the Method of Electromagnetic Emission

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