Water-tight stratum rupture under large-scale mining. Part II

Baryakh, A. A.; Samodelkina, N. A.

doi:10.1134/s1062739148060020

Cited by 10 publications

(7 citation statements)

References 2 publications

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“…MATEC Web of Conferences 265, 05026 (2019) https://doi.org/10.1051/matecconf/201926505026 GCCETS 2018 are in good agreement with the information on the location and configuration of existing salt mines [11,12]. a b Fig.…”

supporting

confidence: 68%

“…The characteristic size 2L of the deformed part of the surface is determined by the bedding depth H. The ratio / LH depends on the size of the mine working and the mechanical properties of the rock strata. For example, in [10] it is noted that for coal mines this ratio is 0.7 and, for salt deposits, it is in the range from 1.65 to 1.85 [11]. For salt deposits, exploited at depths 300 400m  H = , according to estimates [12,13], the distance L is 500÷600m.…”

Section: Fig 1 the Scheme Of Changes Of The Earth's Surface Overlyimentioning

confidence: 99%

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Control of surface subsidence based on building deformation monitoring data

et al. 2019

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This paper presents an approach to the estimation of ground surface distortion based on the data from the online deformation monitoring systems mounted on the foundations of the group of buildings located in the area of ground instability. The local monitoring systems provide control of building foundation settlements using the hydrostatic level measurement technique. These data are used to calculate the inclination foundation angles which reflect the distortion of the earth's surface at local points. The hydrostatic level system allows one to perform measurements with the desired space and time sampling and to obtain a quite detailed picture of the changes in the deformation parameters over time. A set of such local monitoring units forms a distributed system that allows monitoring the state of the earth's surface over a large area. Here, we present long-term results obtained using such system located in the city area above mining. The evolution of the inclination angles of the group of overlying buildings is shown. We discuss the validity of this approach, and estimate the accuracy of the measuring method and the factors that influence it. Finally, we assess the possibility of making short-term predictions of deformation processes inside the rock massif.

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confidence: 68%

Section: Fig 1 the Scheme Of Changes Of The Earth's Surface Overlyimentioning

confidence: 99%

Control of surface subsidence based on building deformation monitoring data

et al. 2019

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“…The obtained test results can be used for the predictive estimates of service life of rib pillars, which is of high concern in terms of safety of mining operations. Wide introduction of this control system in potash salt mining can enable prompt implementation of reasonable flooding precautions in mines [25].…”

Section: Discussionmentioning

confidence: 99%

Operational control of rib pillar stability

Baryah¹,

Evseev²,

Lomakin³

et al. 2020

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In room-and-pillar mineral mining, rib pillars should support overlying rock mass for the specified time limit of production. Therefore, one of the mining safety components is monitoring of the behavior of rib pillars in the course of time. For the conditions of the room-andpillar method of mining, the authors propose a monitoring procedure for rib pillar deformation based on operational measurements of horizontal convergence in stopes. The theoretical and experimental research proves that transverse deformation of rib pillars is an informative parameter suitable for generalized assessment of pillar failure. The obtained ranges of critical transverse deformation rates (50–100 mm/m/yr) in rib pillars can tentatively be used as an indicator of the critical stability of load-bearing structures in room-and-pillar mining. In-situ determination of the integral transverse deformation rates in rib pillars is based on the ratio of the measured horizontal convergence in stopes to the width of pillars. Implementation of the proposed approach in the Upper Kama potash salt mines has proved its applicability to identification of rock mass areas where intense deformation is expected. The comparison of the monitoring data of the transverse deformation rates and their critical values determined makes it possible to predict service life of rib pillars, which is very important in terms of safety of mining operations. This study was supported by the Russian Science Foundation, Grant No. 19-77-30008.

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“…(1), owing to the use of nonlinear shape functions (as analytical solution of a stress problem for a single layer) in the FEM (finite element method) semi-analytical scheme, allows us to considerably decrease the number of the unknown. When using this approach, the total number of the unknown in the elastic equilibrium problem for a system of plane-parallel layers is equal to 4 ( 1) K N  , where K is the number of terms in a Fourier series retained in expansion (2), and N is the number of layers. Symmetry about the y-axis, makes it possible to reduce the number of the unknowns by half.…”

Section: S Finite-dimensional Analog Construction Methodsmentioning

confidence: 99%

“…edimentary rock masses, the interior of which often contains salt deposits, are characterized by a thin-layered structure. The analysis of their strain-stress state and failure as a result of mining operations is of considerable importance in ensuring the protection of mines against flooding [1,2]. In certain cases such rock masses can be represented as a system of plane-parallel layers.…”

Section: Introductionmentioning

confidence: 99%

On one approach to the numerical modeling of the strain-stress state of layered rock mass

Lobanov

Baryakh

2019

Frattura Ed Integrità Strutturale

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According to the principle of virtual work for a system of elastic layers, a semi-analytical scheme for constructing the finite-dimensional analog of the variational equation was developed based on the well-known analytical solution in the Fourier series for a single layer. The solution of a test problem shows that the constructed numerical procedure of mathematical modeling ensures fairly accurate calculations and highly effective computer-aided realization. It was demonstrated that the proposed semi-analytical scheme for constructing the finite-dimensional analog of the variational equation can be effectively used for the assessment of safety conditions of the potash salt development within the Upper Kama salt deposit.

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Water-tight stratum rupture under large-scale mining. Part II

Cited by 10 publications

References 2 publications

Control of surface subsidence based on building deformation monitoring data

Control of surface subsidence based on building deformation monitoring data

Operational control of rib pillar stability

On one approach to the numerical modeling of the strain-stress state of layered rock mass

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