Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content
Abstract Rheological mechanical properties of the soft rock are affected significantly by its main physical characteristics-clay mineral. In this study, taking the mudstone on the roof and floor in four typical mining regions as the research object, firstly, the clay mineral characteristic was analy...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-09-01
|
| Series: | International Journal of Coal Science & Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40789-023-00615-3 |
| _version_ | 1797454081368784896 |
|---|---|
| author | Xuebin Li Xuesheng Liu Yunliang Tan Ai Chen Honglei Wang Xin Wang Shenglong Yang |
| author_facet | Xuebin Li Xuesheng Liu Yunliang Tan Ai Chen Honglei Wang Xin Wang Shenglong Yang |
| author_sort | Xuebin Li |
| collection | DOAJ |
| description | Abstract Rheological mechanical properties of the soft rock are affected significantly by its main physical characteristics-clay mineral. In this study, taking the mudstone on the roof and floor in four typical mining regions as the research object, firstly, the clay mineral characteristic was analyzed by the X-ray diffraction test. Subsequently, rheological mechanical properties of mudstone samples under different confining pressures are studied through triaxial compression and creep tests. The results show that the clay mineral content of mudstone in different regions is different, which leads to significant differences in its rheological properties, and these differences have a good correlation with the content of montmorillonite and illite-montmorillonite mixed layer. Taking the montmorillonite content as an example, compared with the sample with 3.56% under the lower stress level, the initial creep deformation of the sample with 11.19% increased by 3.25 times, the viscosity coefficient and long-term strength decreased by 80.59% and 53.94%, respectively. Furthermore, based on the test results, the damage variation is constructed considering the montmorillonite content and stress level, and the M–S creep damage constitutive model of soft rock is established. Finally, the test results can be fitted with determination coefficients ranging from 0.9020 to 0.9741, which proves that the constitutive relation can reflect the influence of the clay mineral content in the samples preferably. This study has an important reference for revealing the long-term stability control mechanism of soft rock roadway rich in clay minerals. |
| first_indexed | 2024-03-09T15:33:08Z |
| format | Article |
| id | doaj.art-5e53eb21781f4b30ad17415a7046fbc8 |
| institution | Directory Open Access Journal |
| issn | 2095-8293 2198-7823 |
| language | English |
| last_indexed | 2024-03-09T15:33:08Z |
| publishDate | 2023-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj.art-5e53eb21781f4b30ad17415a7046fbc82023-11-26T12:09:20ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232023-09-0110111510.1007/s40789-023-00615-3Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and contentXuebin Li0Xuesheng Liu1Yunliang Tan2Ai Chen3Honglei Wang4Xin Wang5Shenglong Yang6College of Energy and Mining Engineering, Shandong University of Science and TechnologyCollege of Energy and Mining Engineering, Shandong University of Science and TechnologyCollege of Energy and Mining Engineering, Shandong University of Science and TechnologyNingxia Coal Industry Co., Ltd., of China Energy GroupBadong National Observation and Research Station of Geohazards, China University of GeosciencesCollege of Energy and Mining Engineering, Shandong University of Science and TechnologyCollege of Energy and Mining Engineering, Shandong University of Science and TechnologyAbstract Rheological mechanical properties of the soft rock are affected significantly by its main physical characteristics-clay mineral. In this study, taking the mudstone on the roof and floor in four typical mining regions as the research object, firstly, the clay mineral characteristic was analyzed by the X-ray diffraction test. Subsequently, rheological mechanical properties of mudstone samples under different confining pressures are studied through triaxial compression and creep tests. The results show that the clay mineral content of mudstone in different regions is different, which leads to significant differences in its rheological properties, and these differences have a good correlation with the content of montmorillonite and illite-montmorillonite mixed layer. Taking the montmorillonite content as an example, compared with the sample with 3.56% under the lower stress level, the initial creep deformation of the sample with 11.19% increased by 3.25 times, the viscosity coefficient and long-term strength decreased by 80.59% and 53.94%, respectively. Furthermore, based on the test results, the damage variation is constructed considering the montmorillonite content and stress level, and the M–S creep damage constitutive model of soft rock is established. Finally, the test results can be fitted with determination coefficients ranging from 0.9020 to 0.9741, which proves that the constitutive relation can reflect the influence of the clay mineral content in the samples preferably. This study has an important reference for revealing the long-term stability control mechanism of soft rock roadway rich in clay minerals.https://doi.org/10.1007/s40789-023-00615-3Clay mineralPhysical characteristicCreepDamageConstitutive model |
| spellingShingle | Xuebin Li Xuesheng Liu Yunliang Tan Ai Chen Honglei Wang Xin Wang Shenglong Yang Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content International Journal of Coal Science & Technology Clay mineral Physical characteristic Creep Damage Constitutive model |
| title | Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content |
| title_full | Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content |
| title_fullStr | Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content |
| title_full_unstemmed | Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content |
| title_short | Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content |
| title_sort | rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content |
| topic | Clay mineral Physical characteristic Creep Damage Constitutive model |
| url | https://doi.org/10.1007/s40789-023-00615-3 |
| work_keys_str_mv | AT xuebinli rheologicalmechanicalpropertiesanditsconstitutiverelationofsoftrockconsideringinfluenceofclaymineralcompositionandcontent AT xueshengliu rheologicalmechanicalpropertiesanditsconstitutiverelationofsoftrockconsideringinfluenceofclaymineralcompositionandcontent AT yunliangtan rheologicalmechanicalpropertiesanditsconstitutiverelationofsoftrockconsideringinfluenceofclaymineralcompositionandcontent AT aichen rheologicalmechanicalpropertiesanditsconstitutiverelationofsoftrockconsideringinfluenceofclaymineralcompositionandcontent AT hongleiwang rheologicalmechanicalpropertiesanditsconstitutiverelationofsoftrockconsideringinfluenceofclaymineralcompositionandcontent AT xinwang rheologicalmechanicalpropertiesanditsconstitutiverelationofsoftrockconsideringinfluenceofclaymineralcompositionandcontent AT shenglongyang rheologicalmechanicalpropertiesanditsconstitutiverelationofsoftrockconsideringinfluenceofclaymineralcompositionandcontent |