Conceptual basis of mining intensification by the geomechanical factor

Skipochka, Serhii

doi:10.1051/e3sconf/201910900089

Cited by 11 publications

(8 citation statements)

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“…The concept is based on the results of long-term scientific and technical support of coal mining in mines of Ukraine, which was carried out with the participation of the authors. Some of these studies were included in a number of publications, for example, [13][14][15][16].…”

Section: Resultsmentioning

confidence: 99%

The concept of risk-based technical solutions for the protection of coal mine workings

Skipochka

Palamarchuk

Prokhorets

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Annotation The concept of risk-based technical solutions for the protection of coal mines workings is outlined. The initial data of effective risk management methods are substantiated. A mixed method of risks assessment has been used. The method involves building a matrix of consequences and probabilities by ranking them in the form of tables. The following data have been used as initial data: location, method and parameters of the workings protection, additional measures to manage the state of the rock mass around the workings, cost of certain types of work and material costs, purpose and term operation of the workings. Technical solutions for the protection of underground workings in coal mines to increase labor safety and reduce environmental and financial risks are substantiated. Initial data for effective methods of risks management in the protection of workings in difficult mining and technical conditions have been prepared. It is recommended to use these data as the basis of the new regulatory framework.

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Section: Resultsmentioning

confidence: 99%

The concept of risk-based technical solutions for the protection of coal mine workings

Skipochka

Palamarchuk

Prokhorets

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The coupled processes of the rock massif deformation and gas filtration in a disturbed area are described by a system of equations [10][11][12][13]:…”

Section: Methodsmentioning

confidence: 99%

Outburst cavity formation in the working face driven along the outburst-prone coal seam

2020

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In Donbas coal mines, coal and gas outbursts present a major risk for the mining operation safety. Rapidly released energy can cause serious damage to the mine’s personnel and production equipment. Modern numerical methods allow modeling complex physical processes occurred during the coal and gas outbursts. The mathematical model was developed for the coupled processes of the rock massif deformation and gas filtration in the mine face near the tectonic dislocation. When solving the problem, the finite element method was used. The calculation results of the stresses, inelastic deformation zones, pressures of methane and configuration of cavity of the coal and gas outburst are represented in the paper. It is shown that an outburst cavity is formed inside the coal seam and is bounded from above and from below by the host rocks. The calculated geometry of the fracture cavity at the gas-dynamic phenomena in the mine working face coincides with actual data obtained in the mines of Donbas and, therefore, confirms the adequacy of the developed mathematical model.

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“…The final result is the development of a set of recommendations for the selection of rational parameters for conducting stope operations at the 850 th extraction site and maintaining the network of main workings of the с 8 b seam. During the research, the following is used: technical documentation and geological information provided by the mine administration, the research results of Dnipro University of Technology [18] and M. S. Polyakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine in terms of modern methodological properties of lithotypes in the Western Donbas, information from mining-technical literature on the specificity of rock pressure manifestations and mechanical characteristics of the Western Donbas coal-bearing stratum [19].…”

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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Conceptual basis of mining intensification by the geomechanical factor

Cited by 11 publications

References 0 publications

The concept of risk-based technical solutions for the protection of coal mine workings

The concept of risk-based technical solutions for the protection of coal mine workings

Outburst cavity formation in the working face driven along the outburst-prone coal seam

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

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