Implementing FLAC3D model for simulating deformation mechanism of steel frame support set by actual profile

Nazymko, V.V.; Griniov, V

doi:10.15407/mining10.01.057

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…In the work [4], large-scale research has been performed on the experimental study of the rock mass discontinuity around the extraction drifts and end areas of longwall faces, which are very useful for quantifying the sizes of the discontinuity areas in the coal-bearing stratum and predicting the rock pressure manifestations. The results obtained in [5], including the FEM modeling, are used to substantiate the parameters of the geomechanical models in the present research.…”

Section: Introductionmentioning

confidence: 99%

Geomechanical substantiation of parameters for safe completion of mining the coal reserves adjacent to main workings

Bondarenko¹,

Symanovych²,

Kovalevska³

et al. 2023

Nauk. visn. nat. hirn. univ.

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Purpose. Geomechanical substantiation of the parameters for conducting stope operations, ensuring the operational state of main workings. Methodology. The research is performed using an algorithm which includes the sequential execution of interrelated stages: analysis of mining-geological and mining-technical conditions for maintaining the network of main workings; mine observations of their state with the identification of specifics of rock pressure manifestations and predicting the probable negative consequences of conducting stope operations in the immediate vicinity; preliminary substantiation of possible technological options for mining the coal seam, taking into account the preservation of operational state of main workings. Scientific calculations for determining the most expedient option are based on the development of geomechanical models of the rock mass behavior around the main workings when mining the adjacent extraction site; analysis of the mass stress-strain state with the prediction of probable rock pressure manifestations; development of recommendations for limiting (or completely eliminating) the negative consequences of conducting stope operations near main workings. The above algorithm of actions uses a combination of experimental mine research methods with technologies for performing computational experiments based on the finite element method. Findings. A systematic analysis of the mining-geological and mining-technical conditions for maintaining the network of main workings has been performed, the results of which are used to substantiate ideas about the mechanism for the occurrence of specifics of rock pressure manifestations, recorded during instrumental observations of their state. Three options have been developed for completing the mining of the extraction site adjacent to the mine horizon main workings. For each of them, a geomechanical model has been constructed for calculating the stress-strain state of the adjacent coal-bearing mass. Its analysis makes it possible to formulate a number of recommendations regarding the rational parameters for conducting stope operations, as well as structural and technological solutions to increase the stability of the main workings and maintain the conditions for their safe operation. Originality. New dependences of influence of the extraction sites on the main working network stability depending on the texture and mechanical properties of lithotypes have been obtained based on the research on the stress-strain state of a weakly metamorphosed mass. For the first time, geomechanical models have been developed of the mutual influence of main workings on the parameters for conducting stope operations. Practical value. The presented recommendations simultaneously reduce the loss of coal reserves and preserve the network of main workings in proper operational state.

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Section: Introductionmentioning

confidence: 99%

Geomechanical substantiation of parameters for safe completion of mining the coal reserves adjacent to main workings

Bondarenko¹,

Symanovych²,

Kovalevska³

et al. 2023

Nauk. visn. nat. hirn. univ.

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The negative effect of a torsion dissipative structure on the stability and bearing capacity of the yield frame support

Nazymko,

Zakharova,

Skrzypkowski

et al. 2024

Tunnelling and Underground Space Technology

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Problems of mining the prospective coal-bearing areas in Donbas

Nehrii

Bachurin

et al. 2019

E3S Web Conf.

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The prospective coal-bearing areas of Donbas in Ukraine have been identified. Their development will increase the energy security of Ukraine. It has been suggested that the development of these areas will involve mining the coal seams in a weak roof and floor environment, which are characterized by low compressive strength, lower density and a tendency to plastic deformations. The stability has been assessed of the rocks outcrop on the contour of mine roadways for mines operating in these areas. It has been determined that roof rocks in most of these mines belong to a range of groups from very unstable to moderately stable, and the bottom rocks are, in most cases, prone to swelling. This complicates the intensive prospective areas mining with the use of advanced technologies, as well as secondary support for retained goaf-side gateroads with limited yielding property. The mines have been determined, for which this issue is relevant when mining the seams with further increase in the depth. The mechanism of displacement in the secondary supports and has been exemplified and studied using the numerical method. The obtained results allowed us to substantiate the necessity of developing new technical solutions for the protection of gateroads under conditions of prospective Donbas areas.

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Implementing FLAC3D model for simulating deformation mechanism of steel frame support set by actual profile

Cited by 4 publications

References 12 publications

Geomechanical substantiation of parameters for safe completion of mining the coal reserves adjacent to main workings

Geomechanical substantiation of parameters for safe completion of mining the coal reserves adjacent to main workings

The negative effect of a torsion dissipative structure on the stability and bearing capacity of the yield frame support

Problems of mining the prospective coal-bearing areas in Donbas

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