Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-Seepage
Mudstone material in a deep roadway is under the coupled stress-seepage condition. To investigate the permeability change and damage development during rock excavation in roadways, a stress-seepage damage coupling model has been proposed. In this model, damage capacity expansion of mudstone material...
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MDPI AG
2020-08-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/17/3755 |
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| author | Bin Liu Jinlan Li Quansheng Liu Xuewei Liu |
| author_facet | Bin Liu Jinlan Li Quansheng Liu Xuewei Liu |
| author_sort | Bin Liu |
| collection | DOAJ |
| description | Mudstone material in a deep roadway is under the coupled stress-seepage condition. To investigate the permeability change and damage development during rock excavation in roadways, a stress-seepage damage coupling model has been proposed. In this model, damage capacity expansion of mudstone material is considered as the initiation and propagation of micro-cracks and the fracture penetration. A damage variable is introduced into the proposed model based on the principle of minimum energy consumption. As a result, an elastoplastic damage constitutive equation is established. Then, the permeability evolution equation describing the micro-macro hydraulic behavior of mudstone is deduced via percolation theory, which can describe the characteristics of sudden permeability change after rock capacity expansion. Furthermore, a finite element model is established based on commercial finite element software-ABAQUS. The numerical model was firstly verified by comparison between experimental and simulation results. On the basis of it, numerical investigation of the temporal and spatial evolution law of pore pressure, damage and permeability coefficient during roadway excavation is undertaken. The numerical results indicate that with increase of construction time, pore pressure first increases and then decreases, while the damage zone and permeability coefficient increase gradually and finally nearly keep constant. The proposed coupling model and finite element method can describe damage and permeability evolution for mudstone material under coupled stress-seepage well. |
| first_indexed | 2024-03-10T16:52:02Z |
| format | Article |
| id | doaj.art-8d95d943d6ce4325b21fb8b40e2b862f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T16:52:02Z |
| publishDate | 2020-08-01 |
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| series | Materials |
| spelling | doaj.art-8d95d943d6ce4325b21fb8b40e2b862f2023-11-20T11:17:42ZengMDPI AGMaterials1996-19442020-08-011317375510.3390/ma13173755Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-SeepageBin Liu0Jinlan Li1Quansheng Liu2Xuewei Liu3State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaSchool of Civil Engineering and Environment, Hubei University of Technology, Wuhan 430068, ChinaThe Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province, School of Civil Engineering, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaMudstone material in a deep roadway is under the coupled stress-seepage condition. To investigate the permeability change and damage development during rock excavation in roadways, a stress-seepage damage coupling model has been proposed. In this model, damage capacity expansion of mudstone material is considered as the initiation and propagation of micro-cracks and the fracture penetration. A damage variable is introduced into the proposed model based on the principle of minimum energy consumption. As a result, an elastoplastic damage constitutive equation is established. Then, the permeability evolution equation describing the micro-macro hydraulic behavior of mudstone is deduced via percolation theory, which can describe the characteristics of sudden permeability change after rock capacity expansion. Furthermore, a finite element model is established based on commercial finite element software-ABAQUS. The numerical model was firstly verified by comparison between experimental and simulation results. On the basis of it, numerical investigation of the temporal and spatial evolution law of pore pressure, damage and permeability coefficient during roadway excavation is undertaken. The numerical results indicate that with increase of construction time, pore pressure first increases and then decreases, while the damage zone and permeability coefficient increase gradually and finally nearly keep constant. The proposed coupling model and finite element method can describe damage and permeability evolution for mudstone material under coupled stress-seepage well.https://www.mdpi.com/1996-1944/13/17/3755mudstone materialdamage modelpermeability evolutionfinite element methodcoupled stress-seepage |
| spellingShingle | Bin Liu Jinlan Li Quansheng Liu Xuewei Liu Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-Seepage Materials mudstone material damage model permeability evolution finite element method coupled stress-seepage |
| title | Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-Seepage |
| title_full | Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-Seepage |
| title_fullStr | Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-Seepage |
| title_full_unstemmed | Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-Seepage |
| title_short | Analysis of Damage and Permeability Evolution for Mudstone Material under Coupled Stress-Seepage |
| title_sort | analysis of damage and permeability evolution for mudstone material under coupled stress seepage |
| topic | mudstone material damage model permeability evolution finite element method coupled stress-seepage |
| url | https://www.mdpi.com/1996-1944/13/17/3755 |
| work_keys_str_mv | AT binliu analysisofdamageandpermeabilityevolutionformudstonematerialundercoupledstressseepage AT jinlanli analysisofdamageandpermeabilityevolutionformudstonematerialundercoupledstressseepage AT quanshengliu analysisofdamageandpermeabilityevolutionformudstonematerialundercoupledstressseepage AT xueweiliu analysisofdamageandpermeabilityevolutionformudstonematerialundercoupledstressseepage |