Study on the evolution of permeability properties of limestone under different stress paths
Stress path change has a great relationship with the effect of deformation and strength of rock. However, the underground rock body is in the engineering environment where the stress field, seepage field, and other fields are coupled to change, the law of fluid flow in the rock body is complex and v...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2024-04-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/arh-2024-0003 |
| _version_ | 1797219205457641472 |
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| author | Huang Gang Lu Gang Zhang Ji Zhou Fengjun Li Dongwei |
| author_facet | Huang Gang Lu Gang Zhang Ji Zhou Fengjun Li Dongwei |
| author_sort | Huang Gang |
| collection | DOAJ |
| description | Stress path change has a great relationship with the effect of deformation and strength of rock. However, the underground rock body is in the engineering environment where the stress field, seepage field, and other fields are coupled to change, the law of fluid flow in the rock body is complex and variable. The change in the stress field has an important effect on the seepage characteristics of rock body; therefore, it is necessary to study the pattern of rock permeability evolution pattern by different stress paths. This study is based on the study of limestone, conducting triaxial unloading seepage mechanics experiments, the evolution of permeability properties of limestone specimens was analyzed based on the test results. The results show that in the conventional triaxial loading seepage test, the permeability of the limestone decreases before the rock stress reaches the peak intensity and increases after that. Increasing axial pressure unloading surrounding pressure compression section, permeability loss rate and effective stress are in line with the changing law of Gaussian distribution function. Under the action of constant axial pressure unloading surrounding pressure, with the increase in unloading amount, the permeability rate of change appears to increase slowly, and in the late stage of unloading section, the permeability rate of change appears to surge. Unloading section permeability change rate and cumulative unloading amount are in line with the law of change of the exponential function. Creep unloading pressure seepage test found that unloading pressure stage strain-time and permeability-time evolution characteristics are in line with the exponential rule of change. The experimental results of this study can provide an important experimental and theoretical basis for the permeability analysis of low-permeability rock body under complex stress conditions in underground engineering. |
| first_indexed | 2024-04-24T12:29:57Z |
| format | Article |
| id | doaj.art-b5822a48f1e44115beb8b341f6baa779 |
| institution | Directory Open Access Journal |
| issn | 1617-8106 |
| language | English |
| last_indexed | 2024-04-24T12:29:57Z |
| publishDate | 2024-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Applied Rheology |
| spelling | doaj.art-b5822a48f1e44115beb8b341f6baa7792024-04-08T07:35:27ZengDe GruyterApplied Rheology1617-81062024-04-0134140710.1515/arh-2024-0003Study on the evolution of permeability properties of limestone under different stress pathsHuang Gang0Lu Gang1Zhang Ji2Zhou Fengjun3Li Dongwei4School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430071, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430071, ChinaGushan Mining Co., Ltd, Anhui Masteel Mining Resources Group, Maanshan, 243100, ChinaCollege of Civil Engineering, Henan Institute of Engineering, Zhengzhou, 451191, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430071, ChinaStress path change has a great relationship with the effect of deformation and strength of rock. However, the underground rock body is in the engineering environment where the stress field, seepage field, and other fields are coupled to change, the law of fluid flow in the rock body is complex and variable. The change in the stress field has an important effect on the seepage characteristics of rock body; therefore, it is necessary to study the pattern of rock permeability evolution pattern by different stress paths. This study is based on the study of limestone, conducting triaxial unloading seepage mechanics experiments, the evolution of permeability properties of limestone specimens was analyzed based on the test results. The results show that in the conventional triaxial loading seepage test, the permeability of the limestone decreases before the rock stress reaches the peak intensity and increases after that. Increasing axial pressure unloading surrounding pressure compression section, permeability loss rate and effective stress are in line with the changing law of Gaussian distribution function. Under the action of constant axial pressure unloading surrounding pressure, with the increase in unloading amount, the permeability rate of change appears to increase slowly, and in the late stage of unloading section, the permeability rate of change appears to surge. Unloading section permeability change rate and cumulative unloading amount are in line with the law of change of the exponential function. Creep unloading pressure seepage test found that unloading pressure stage strain-time and permeability-time evolution characteristics are in line with the exponential rule of change. The experimental results of this study can provide an important experimental and theoretical basis for the permeability analysis of low-permeability rock body under complex stress conditions in underground engineering.https://doi.org/10.1515/arh-2024-0003rock mechanicsstress pathpermeabilitytriaxialseepage-stress coupling |
| spellingShingle | Huang Gang Lu Gang Zhang Ji Zhou Fengjun Li Dongwei Study on the evolution of permeability properties of limestone under different stress paths Applied Rheology rock mechanics stress path permeability triaxial seepage-stress coupling |
| title | Study on the evolution of permeability properties of limestone under different stress paths |
| title_full | Study on the evolution of permeability properties of limestone under different stress paths |
| title_fullStr | Study on the evolution of permeability properties of limestone under different stress paths |
| title_full_unstemmed | Study on the evolution of permeability properties of limestone under different stress paths |
| title_short | Study on the evolution of permeability properties of limestone under different stress paths |
| title_sort | study on the evolution of permeability properties of limestone under different stress paths |
| topic | rock mechanics stress path permeability triaxial seepage-stress coupling |
| url | https://doi.org/10.1515/arh-2024-0003 |
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