Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal.
The accurate determination of permeability is one of the parameters essential for the study of fluid flow and transport state. However, a large number of fractured coal bodies are faced during the production of coal mines. The study of permeability of these special media composed of grains of a cert...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2021-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0261678 |
| _version_ | 1828138102652141568 |
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| author | Mingkun Pang Tianjun Zhang Lu Gao Binfeng Qin |
| author_facet | Mingkun Pang Tianjun Zhang Lu Gao Binfeng Qin |
| author_sort | Mingkun Pang |
| collection | DOAJ |
| description | The accurate determination of permeability is one of the parameters essential for the study of fluid flow and transport state. However, a large number of fractured coal bodies are faced during the production of coal mines. The study of permeability of these special media composed of grains of a certain size, whose structure is different from that of raw coal, has been in the exploratory stage. In this paper, inspired by the calculation method of median particle size and the calculation principle of KC's equation, we calculate the permeability parameters of broken coal particles. It is considered that its permeability is closely related to the compaction and re-crushing process of skeletal grains. The lateral limit compression test of the crushed coal body was designed, and the pore-dominated permeability calculation method was given to reveal the mechanism of the action of the effective stress. The dependence relationship between the effective stress and the pore-correlation permeability is obtained by data analysis, and the force and deformation process of the crushed coal grain media is described. In contrast to the conventional Darcy series of permeability discussions, our approach excludes the influence of fluid factors on the permeability of porous media. The permeability of porous media is considered to be determined only by its own pore structure. |
| first_indexed | 2024-04-11T18:30:43Z |
| format | Article |
| id | doaj.art-3883ce793091432e88c131a61411c7e2 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-11T18:30:43Z |
| publishDate | 2021-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-3883ce793091432e88c131a61411c7e22022-12-22T04:09:27ZengPublic Library of Science (PLoS)PLoS ONE1932-62032021-01-011612e026167810.1371/journal.pone.0261678Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal.Mingkun PangTianjun ZhangLu GaoBinfeng QinThe accurate determination of permeability is one of the parameters essential for the study of fluid flow and transport state. However, a large number of fractured coal bodies are faced during the production of coal mines. The study of permeability of these special media composed of grains of a certain size, whose structure is different from that of raw coal, has been in the exploratory stage. In this paper, inspired by the calculation method of median particle size and the calculation principle of KC's equation, we calculate the permeability parameters of broken coal particles. It is considered that its permeability is closely related to the compaction and re-crushing process of skeletal grains. The lateral limit compression test of the crushed coal body was designed, and the pore-dominated permeability calculation method was given to reveal the mechanism of the action of the effective stress. The dependence relationship between the effective stress and the pore-correlation permeability is obtained by data analysis, and the force and deformation process of the crushed coal grain media is described. In contrast to the conventional Darcy series of permeability discussions, our approach excludes the influence of fluid factors on the permeability of porous media. The permeability of porous media is considered to be determined only by its own pore structure.https://doi.org/10.1371/journal.pone.0261678 |
| spellingShingle | Mingkun Pang Tianjun Zhang Lu Gao Binfeng Qin Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal. PLoS ONE |
| title | Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal. |
| title_full | Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal. |
| title_fullStr | Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal. |
| title_full_unstemmed | Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal. |
| title_short | Investigating the effects of effective stress on pore-dependent permeability measurements of crushed coal. |
| title_sort | investigating the effects of effective stress on pore dependent permeability measurements of crushed coal |
| url | https://doi.org/10.1371/journal.pone.0261678 |
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