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Effects of gas adsorption on mechanical properties and erosion mechanism of coal.

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Title: Effects of gas adsorption on mechanical properties and erosion mechanism of coal.
Authors: Hu, Shaobin1, Wang, Enyuan2 weytopcumt@163.com, Li, Xiaochun1, Bai, Bing1
Source: Journal of Natural Gas Science & Engineering. Mar2016, Vol. 30, p531-538. 8p.
Subjects: Coal, Gas absorption & adsorption, Deformations (Mechanics), Fracture mechanics, Axial flow compressors, Materials compression testing, Mechanical behavior of materials, Erosion
Abstract: In order to study coal deformation and fractured mechanism under pore gas action, we chose gases N 2 and CH 4 as pore fluids, and carried out triaxial compression test of gas-bearing coal. To further explore the effects of gas erosion on coal deformation and failure, we tested the deformation and rapture process of coal during gas adsorption equilibrium under fixed axial load and confining pressure. The results showed that gas adsorption decreases coal's solid surface energy and lowers coal's compressive strength, leading to larger plastic deformation in coal and final rupture instability. From the physicochemical angle, we quantified the adsorbed gas erosion effects of coal based on both Griffith crack extension theory and Mohr–Columb strength criterion, explored the mechanical characteristics and erosion damage process of gas containing coals and put forwarded their mathematical models. These models can describe the experimental phenomena fairly. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Natural Gas Science & Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 114459111
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Effects of gas adsorption on mechanical properties and erosion mechanism of coal.
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  Data: <searchLink fieldCode="AR" term="%22Hu%2C+Shaobin%22">Hu, Shaobin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Enyuan%22">Wang, Enyuan</searchLink><relatesTo>2</relatesTo><i> weytopcumt@163.com</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Xiaochun%22">Li, Xiaochun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bai%2C+Bing%22">Bai, Bing</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Natural+Gas+Science+%26+Engineering%22">Journal of Natural Gas Science & Engineering</searchLink>. Mar2016, Vol. 30, p531-538. 8p.
– Name: Subject
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  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Coal%22">Coal</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+absorption+%26+adsorption%22">Gas absorption & adsorption</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+mechanics%22">Fracture mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Axial+flow+compressors%22">Axial flow compressors</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+compression+testing%22">Materials compression testing</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Erosion%22">Erosion</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In order to study coal deformation and fractured mechanism under pore gas action, we chose gases N 2 and CH 4 as pore fluids, and carried out triaxial compression test of gas-bearing coal. To further explore the effects of gas erosion on coal deformation and failure, we tested the deformation and rapture process of coal during gas adsorption equilibrium under fixed axial load and confining pressure. The results showed that gas adsorption decreases coal's solid surface energy and lowers coal's compressive strength, leading to larger plastic deformation in coal and final rupture instability. From the physicochemical angle, we quantified the adsorbed gas erosion effects of coal based on both Griffith crack extension theory and Mohr–Columb strength criterion, explored the mechanical characteristics and erosion damage process of gas containing coals and put forwarded their mathematical models. These models can describe the experimental phenomena fairly. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Natural Gas Science & Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jngse.2016.02.039
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 531
    Subjects:
      – SubjectFull: Coal
        Type: general
      – SubjectFull: Gas absorption & adsorption
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Fracture mechanics
        Type: general
      – SubjectFull: Axial flow compressors
        Type: general
      – SubjectFull: Materials compression testing
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Erosion
        Type: general
    Titles:
      – TitleFull: Effects of gas adsorption on mechanical properties and erosion mechanism of coal.
        Type: main
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          Name:
            NameFull: Hu, Shaobin
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            NameFull: Wang, Enyuan
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            NameFull: Li, Xiaochun
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            NameFull: Bai, Bing
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          Dates:
            – D: 01
              M: 03
              Text: Mar2016
              Type: published
              Y: 2016
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            – Type: issn-print
              Value: 18755100
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              Value: 30
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            – TitleFull: Journal of Natural Gas Science & Engineering
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