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The Combined Effect of Stress Mutation and Displacement Evolution on Overlying Rock Collapse From Physical Experiment and Numerical Simulation Study.

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Title: The Combined Effect of Stress Mutation and Displacement Evolution on Overlying Rock Collapse From Physical Experiment and Numerical Simulation Study.
Authors: Wang, Gang1,2 (AUTHOR), Deng, Daixin2,3 (AUTHOR) ddx@suse.edu.cn, Liu, Jing1,2 (AUTHOR), Yongliang, He (AUTHOR) hyl@tyust.edu.cn
Source: Geofluids. 4/12/2026, Vol. 2026, p1-15. 15p.
Subject Terms: *Longwall mining, *Strains & stresses (Mechanics), *Structural failures, *Spoil banks, *Computer simulation, *Physics experiments, *Deformations (Mechanics), *Geotechnical engineering
Abstract: This study investigates the complex failure mechanisms of overlying strata deformation induced by longwall mining, with a focus on the 21221 mining face in Qianqiu mine. Combining physical similarity simulation and numerical analysis, the research analyzes the abrupt changes in stress and displacement within the overlying rock mass during mining face advancement. The results show that roof failure occurs periodically, with collapse height and area progressively increasing as the intact bearing zone shifts upward, exerting continuous pressure on the stope. Mining disturbance significantly affects the roof ~40 cm ahead of the working face, where deformation and collapse are governed by gravitational forces and rock lithology. The maximum principal stress concentrates at the goaf edges, and vertical stress mutation accurately indicates impending roof fracture locations. Critically, the failure of hard conglomerate layers triggers a strong regional mutation in the mining‐induced stress field. These results provide important insights into the dynamic evolution and instability precursors of overlying strata in deep mining conditions. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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DbLabel: Energy & Power Source
An: 192955755
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: The Combined Effect of Stress Mutation and Displacement Evolution on Overlying Rock Collapse From Physical Experiment and Numerical Simulation Study.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Gang%22">Wang, Gang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deng%2C+Daixin%22">Deng, Daixin</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> ddx@suse.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Jing%22">Liu, Jing</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yongliang%2C+He%22">Yongliang, He</searchLink> (AUTHOR)<i> hyl@tyust.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Geofluids%22">Geofluids</searchLink>. 4/12/2026, Vol. 2026, p1-15. 15p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Longwall+mining%22">Longwall mining</searchLink><br />*<searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Structural+failures%22">Structural failures</searchLink><br />*<searchLink fieldCode="DE" term="%22Spoil+banks%22">Spoil banks</searchLink><br />*<searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br />*<searchLink fieldCode="DE" term="%22Physics+experiments%22">Physics experiments</searchLink><br />*<searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Geotechnical+engineering%22">Geotechnical engineering</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study investigates the complex failure mechanisms of overlying strata deformation induced by longwall mining, with a focus on the 21221 mining face in Qianqiu mine. Combining physical similarity simulation and numerical analysis, the research analyzes the abrupt changes in stress and displacement within the overlying rock mass during mining face advancement. The results show that roof failure occurs periodically, with collapse height and area progressively increasing as the intact bearing zone shifts upward, exerting continuous pressure on the stope. Mining disturbance significantly affects the roof ~40 cm ahead of the working face, where deformation and collapse are governed by gravitational forces and rock lithology. The maximum principal stress concentrates at the goaf edges, and vertical stress mutation accurately indicates impending roof fracture locations. Critically, the failure of hard conglomerate layers triggers a strong regional mutation in the mining‐induced stress field. These results provide important insights into the dynamic evolution and instability precursors of overlying strata in deep mining conditions. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1155/gfl/7729757
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Longwall mining
        Type: general
      – SubjectFull: Strains & stresses (Mechanics)
        Type: general
      – SubjectFull: Structural failures
        Type: general
      – SubjectFull: Spoil banks
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Physics experiments
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Geotechnical engineering
        Type: general
    Titles:
      – TitleFull: The Combined Effect of Stress Mutation and Displacement Evolution on Overlying Rock Collapse From Physical Experiment and Numerical Simulation Study.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Wang, Gang
      – PersonEntity:
          Name:
            NameFull: Deng, Daixin
      – PersonEntity:
          Name:
            NameFull: Liu, Jing
      – PersonEntity:
          Name:
            NameFull: Yongliang, He
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 12
              M: 04
              Text: 4/12/2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 14688115
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            – Type: volume
              Value: 2026
          Titles:
            – TitleFull: Geofluids
              Type: main
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