Generating methane adsorption under relaxation of molecular structure of coal

Bulat, A.F.; Mineev, S.P.; Prusova, Alla

doi:10.1134/s1062739116010149

Cited by 16 publications

(9 citation statements)

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“…We define the constants entering into equation (5). The concentration of sorbed methane in the undisturbed coal fragments can be estimated from the known distribution of methane forms in coal [10], which for the sorbed gas is about 80 -90 % of the total gas content in the reservoir.…”

Section: Results and Its Discussionmentioning

confidence: 99%

“…3. The analytical expression obtained by simulation for calculating the laws of the desorption process has the exponential form (5). Taking into account the boundary conditions obtained for the coal rock (6) and (8).…”

Section: Discussionmentioning

confidence: 99%

“…At present, the development and introduction of highly efficient technologies for the extraction of coal and gas into the industry is connected with the need to account for methane associated with coal by the sorption bond [1][2][3][4][5]. The patterns of its releasedesorption determine the preparation and development of various types of gas-dynamic manifestations of rock pressure [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Simulation of the desorption process of methane adsorbed in a coal rock, taking into account intermolecular sorption interactions in the system “methane-coal”

2019

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Based on the analysis of the stages of the desorption of methane adsorbed in the coal rock, the simulation of this process was based on its consideration as an activation process of diffusion. It was found that the intermolecular sorption interactions in the "methane-coal" system should be described by the Lennard-Jones potential, taking into account the polymeric nature of the molecular structure of coal. Therefore, an analysis of the modern theories of the kinetics of nonequilibrium sorption processes in high-molecular materials was performed. This analysis showed that the complex of the main molecular factors in the system "methane -coal" can be taken into account most correctly using the Pace -Deutiner molecular parameters. The diffusion coefficient in the equation takes into account the activation energy of the diffusion process, intermolecular sorption interactions in the "methane-coal" system, the parameters of the microstructure of coal, the physical properties of methane and the magnitude of its diffusion jump. The analytical calculation of the diffusion equation is carried out. It allows determining the patterns of the desorption process in various geological conditions of mining operations.

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Section: Results and Its Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation of the desorption process of methane adsorbed in a coal rock, taking into account intermolecular sorption interactions in the system “methane-coal”

2019

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“…It complicates the technical conditions of coal mining, increases its cost, affects the hydrogeological regime, the redistribution of gases in the massif, the gas-dynamic activity of rocks. Intensification of coal mining, deepening of mining, creation of a new industry for extraction and utilization of methane from coal deposits has led to the need to summarize and analyze existing data on the tectonic characteristics of the geological objects under consideration to substantiate the approach to their possible prediction [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Relationship between the indices of physical and mechanical properties of coal and rock, gas saturation and tectonic dislocation of Donbas

Pymonenko

2019

E3S Web Conf.

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The article deals with the distribution of disturbances in the coal-bearing deposits of Donbas and establishment of the relationship between the indices of physical and mechanical properties of coal and rock, gas saturation and tectonic dislocation. To solve the problems, statistical methods were used (correlation and regression analysis). The schemes of deformations of Donbas have been built, both in individual indices and in indices of complex dislocation, which reflect the regional patterns of distribution of the deformations of various types throughout the Donetsk basin. Close statistical relationship has been established between indices of tectonic dislocation, gas saturation, physical and mechanical properties of coal and rocks, which allows the use of the indices of tectonic dislocation to predict gas content at the regional level.

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“…Кроме раскрытия трещин в массиве и получения удовлетворительной гидравлической проницаемости необходимо еще и вытеснить из них метан. Для этого существуют способы извлечения метана из подрабатываемого угольного пласта, включающие непрерывное нагнетание в угольный пласт газа, содержащего двуокись углерода, активизирующего тем самым процесс десорбции из эксплуатационной скважины [5].…”

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The Conceptual Fundamentals for the Functioning of the Mine Degasification System

Kurnosov¹,

Makeiev²,

Novikov³

et al. 2018

Visnyk KrNU

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Generating methane adsorption under relaxation of molecular structure of coal

Cited by 16 publications

References 1 publication

Simulation of the desorption process of methane adsorbed in a coal rock, taking into account intermolecular sorption interactions in the system “methane-coal”

Simulation of the desorption process of methane adsorbed in a coal rock, taking into account intermolecular sorption interactions in the system “methane-coal”

Relationship between the indices of physical and mechanical properties of coal and rock, gas saturation and tectonic dislocation of Donbas

The Conceptual Fundamentals for the Functioning of the Mine Degasification System

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