Geomechanical support of mining operations in mines of the Murmansk Region

Kozyrev, A. A.; Panin, V. I.; Semenova, I. E.; Rybin, V. V.

doi:10.17580/gzh.2019.06.05

Cited by 7 publications

(8 citation statements)

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“…2. The computer finite element modeling of the stress-strain state of the rock massif in the untouched state following the re-peated undermining of the earth's surface after the completion of the stoping operations for each of the removed coal seams K18, K14, K13, K12, K10 with the complete collapse of the roof based on the actual physical and mechanical properties of rocks [29] made it possible to calculate the expected values of vertical, horizontal and total deformations of the earth's surface.…”

Section: Graphic Presentation Of the Boundary Conditions Of The Rock ...mentioning

confidence: 99%

Predicting underground mining impact on the earth’s surface

Ivadilinova¹,

Issabek²,

Takhanov³

et al. 2023

Nauk. visn. nat. hirn. univ.

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Purpose. Development of a digital model of the stress-strain state of a rock mass during the extraction of coal by an underground method to predict the displacement of the earth’s surface. Methodology. The proposed technique is based on modeling the stress-strain state of a rock mass using the finite element method. Computer simulation of the stress-strain state of the rock massif was carried out in the area of lavas worked out in previous years in layers with the index K of the Karaganda suite of the mine named after Kostenko of the Karaganda coal basin, where instrumental surveying measurements were previously made to monitor the vectors and numerical values of the displacements of the earth’s surface undermined by mining. Findings. The reliability of the obtained finite element model of a rock mass for predicting the process of displacement of rocks and the earth’s surface is confirmed by the results of full-scale instrumental mine surveying measurements on the earth’s surface. Originality. For the first time, a method has been proposed for predicting the shifts of points on the earth’s surface, taking into account the physical and mechanical properties of rocks, based on a finite element model of a rock mass. A new approach was applied to assess the reliability of the model of the stress-strain state of a rock mass based on a comparison of the results obtained with the data of instrumental mine surveying. Practical value. A technique for computer simulation of the stress-strain state of a rock mass during the extraction of hard coal at the mine named after Kostenko, owned by one of the world’s leading steel producers, JSC ArcelorMittal. For modeling, a site was chosen in the area of lava mining along the coal seams of the Karaganda Formation of seams, starting from the K18 seam to the K10 seam, that is, a rock mass with a depth of more than 700 m. Previously, within this area a series of instrumental surveying observations was carried out of the displacement of the earth’s surface during the working out of these lavas using the method of roof management – complete collapse. The obtained values of vertical displacements of a point on the earth’s surface according to the results of computer simulation of the stress-strain state of a rock mass correspond to the data of field mine surveying observations of displacements of the same point, which confirms the reliability of the constructed model.

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Section: Graphic Presentation Of the Boundary Conditions Of The Rock ...mentioning

confidence: 99%

Predicting underground mining impact on the earth’s surface

Ivadilinova¹,

Issabek²,

Takhanov³

et al. 2023

Nauk. visn. nat. hirn. univ.

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“…Acoustic impact in quarries is considered weak (up to 500 m) since the main energy of the explosion is expended on rock fragmentation and, to some extent, determines the quality of the explosion [8]. Seismic and sonic wave effects of the explosion were recorded at the mill of the Kondopoga Bakery Combine at two levels: on the ground (seismic sensor installed on the asphalt surface oriented azimuthally towards the explosion point) and on the 6th floor of the mill (seismic sensor oriented in the same azimuth).…”

Section: Seismic Monitoringmentioning

confidence: 99%

The use of a portable seismic station on the territory of Karelia

Lebedev,

Zueva

2023

E3S Web Conf.

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“…The dimensionless coefficient b characterizes the relative share of the energy deposited in the gaseous medium, which goes into ionization processes. For example, b=0.04 for a discharge in molecular nitrogen [25].…”

Section: Dynamics Of the Electronic Componentmentioning

confidence: 99%

Pulsed high-current discharge in water: adiabatic model of expanding plasma channel and acoustic wave

Kozyrev¹,

Zherlitsyn²,

Semeniuk³

2022

Plasma Sci. Technol.

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This paper presents the results of a theoretical and experimental study of the use of a pulsed discharge in water to obtain a strong acoustic wave in a liquid medium. A discharge with a current amplitude of 10 kA, a duration of 400 ns, and an amplitude pulsed power of 280 MW in water at atmospheric pressure created an expanding acoustic wave with an amplitude of more than 100 MPa. To describe the formation of the discharge channel, an isothermal plasma model has been developed, which made it possible to calculate both the expansion dynamics of a high-current channel and the strong acoustic wave generated by it. Our calculations show that the number density of plasma in the channel reaches 10^20 cm^(–3), while the degree of water vapour ionization is about 10%, and the channel wall extends with a velocity of 500 m/s. The calculations for the acoustic wave are in good agreement with measurements

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Geomechanical support of mining operations in mines of the Murmansk Region

Cited by 7 publications

References 0 publications

Predicting underground mining impact on the earth’s surface

Predicting underground mining impact on the earth’s surface

The use of a portable seismic station on the territory of Karelia

Pulsed high-current discharge in water: adiabatic model of expanding plasma channel and acoustic wave

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