Optimal parameters of wall bolts computation in the united bearing system of extraction workings frame-bolt support

Бондаренко, В. П.; Kovalevska, Iryna; Svystun, R.; Cherednichenko, Yu.

doi:10.1201/b16354-2

Cited by 14 publications

(12 citation statements)

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“…Secondly, the presentation of dependences U(t) in the form of two conjugated line graphs do not quite correspond to the real pattern of growing mine working contour displacements in time. Most of the experimental measurements indicate non-linearity in the growth trends in displacements over time [32]- [36]: in the initial period of maintaining mine working, the growth gradient is higher, and then (with an increase in t) there is a decrease in the rate of increase in U. It can be induced by the cracking of the rock mass and decreasing of its quality [37].…”

Section: Basic Research Materialsmentioning

confidence: 99%

Technical and technological aspects of the coal mine closure based on the geomechanical component assessment

Barabash¹,

Salieiev²,

Symanovych³

2021

Min. miner. depos.

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Purpose.Development of a comprehensive methodology for assessing the state of mine workings based on the analysis of their contour displacement patterns when solving the problem of minimizing the risks during the closure of coal mines in Ukraine. Methods. Based on an integrated analysis of international and domestic trends when assessing the consequences of mine closure, the main provisions of using the method of instrumental mine observations have been substantiated. When solving the problem, the approaches of regulatory documents are taken into account to identify the geomechanical situation according to two conditions: the structure and strength properties of the lithotypes in the adjacent coal-bearing stratum and the peculiarities of the rheological processes manifestation during the development of its displacements. Findings. The geomechanical, technological and hydrogeological factors have been distinguished that are required to take into account when closing the coal mines. Fundamental methodological provisions have been substantiated for the most reliable assessment of the mine workings state, taking into account the long period of their operation. A criterion for making a decision on the decommissioning of mine workings or their further maintenance is presented. Originality.A series of generalizing dependences of the mine working contour displacement development has been obtained, which can be divided into four main groups according to the criteria of the structural and strength properties of lithotypes in the adjacent mass, as well as the type of their rheological manifestations: decaying and persistent deformation creep. For each group, using the methods of correlation-dispersive analysis, empirical formulas have been determined for calculating the convergence of the roof and bottom of mine workings, as well as their sides, depending on the geomechanical criterion H/R of the maintenance conditions and the duration t of this period. Practical implications.The obtained correlation ratios make it possible to predict the residual section of mine working at any time of its maintenance. They are a geomechanical component of its operational state assessment. The result of this research is the development of a new methodology for assessing the mine working state according to the patterns for predicting its contour displacement.

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Section: Basic Research Materialsmentioning

confidence: 99%

Technical and technological aspects of the coal mine closure based on the geomechanical component assessment

Barabash¹,

Salieiev²,

Symanovych³

2021

Min. miner. depos.

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“…Such a volume of voids takes part in changes in the geodynamic and seismic conditions in the earth's crust. There is a hypothesis that dynamic processes in their voids are the cause of catastrophic manifestations, for example, the Kolka glacier in the Karmadon gorge of North Ossetia and others [11,12].…”

Section: Research Of Existing Solutions Of the Problemmentioning

confidence: 99%

Development of natural underground ore mining technologies in energy distributed massifs

Lyashenko

Khomenko

Topolnij

et al. 2020

TAPR

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“…The study of the safety of underground mining of ore deposits of complex structure by geophysical methods, taking into account the geomechanical and seismic substantiation of the rational parameters of the production blocks, was carried out by many leading specialists of the developed mining countries of the world [13,14] [15,16]. The management of the stress-strain state of the rock mass and the seismic action of the explosion was addressed by:…”

Section: Research Of Existing Solutions Of the Problemmentioning

confidence: 99%

Justification of safe underground development of mountain deposits of complex structure by geophysical methods

Lyashenko

Khomenko

Chekushina

et al. 2020

TAPR

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Optimal parameters of wall bolts computation in the united bearing system of extraction workings frame-bolt support

Cited by 14 publications

References 0 publications

Technical and technological aspects of the coal mine closure based on the geomechanical component assessment

Technical and technological aspects of the coal mine closure based on the geomechanical component assessment

Development of natural underground ore mining technologies in energy distributed massifs

Justification of safe underground development of mountain deposits of complex structure by geophysical methods

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