Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code
Floor grouting reinforcement and aquifer reform can effectively improve the water barrier performance of fractured rock mass, which is widely used to prevent water inrush from a confined aquifer in theClean Utilization and SDUST Research Fund floor. In order to reveal the mechanical and strain energ...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2023/6044715 |
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| author | Hao Li Juntao Chen Qing Ma Dongxiu Jia Binbin Cheng Ziqun Fu Lei Liu Hongyun Guo Zhu Qu Jingping He |
| author_facet | Hao Li Juntao Chen Qing Ma Dongxiu Jia Binbin Cheng Ziqun Fu Lei Liu Hongyun Guo Zhu Qu Jingping He |
| author_sort | Hao Li |
| collection | DOAJ |
| description | Floor grouting reinforcement and aquifer reform can effectively improve the water barrier performance of fractured rock mass, which is widely used to prevent water inrush from a confined aquifer in theClean Utilization and SDUST Research Fund floor. In order to reveal the mechanical and strain energy characteristics of fractured rock mass after grouting with different grouting parameters, the discrete element numerical simulation software PFC is used to study the mechanical and strain energy characteristics of limestone after filling the fractures with cement stones with different parameters. The numerical test results show that the displacement of the limestone grouting stone bodies with a longer prefabricated crack length decreases more obviously after grouting, and the strain energy, dissipation energy, and total input energy increase when the strengthened limestone sample is destroyed. The greater the stiffness of the cement stone, the easier the limestone grouting stone bodies will be destroyed from the position of the prefabricated crack. The internal friction angle of cement stones has little effect on the strength, deformation, and energy characteristics of limestone. Under the same cohesion, the number and the distribution range of secondary cracks of limestone grouting stone bodies with smaller prefabricated crack length are larger. However, with the increase of the tensile strength of the cement stones, the number, distribution range, and strength of the secondary fractures of the limestone grouting stone bodies are increasing. The longer the prefabricated crack is, the greater the influence of grouting parameters on the rock. The study provides a reference for the selection of reinforcement material parameters during grouting reinforcement. |
| format | Article |
| id | doaj-art-3eef55ccc34a4c8ea277d145b2073f49 |
| institution | OA Journals |
| issn | 1468-8123 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-3eef55ccc34a4c8ea277d145b2073f492025-08-20T02:08:20ZengWileyGeofluids1468-81232023-01-01202310.1155/2023/6044715Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow CodeHao Li0Juntao Chen1Qing Ma2Dongxiu Jia3Binbin Cheng4Ziqun Fu5Lei Liu6Hongyun Guo7Zhu Qu8Jingping He9College of Energy and Mining EngineeringCollege of Energy and Mining EngineeringCollege of Energy and Mining EngineeringQiuji Coal MineChina Center for Safety ResearchCollege of Energy and Mining EngineeringQiuji Coal MineQiuji Coal MineJining Energy Development Group Corporation Ltd.Qiuji Coal MineFloor grouting reinforcement and aquifer reform can effectively improve the water barrier performance of fractured rock mass, which is widely used to prevent water inrush from a confined aquifer in theClean Utilization and SDUST Research Fund floor. In order to reveal the mechanical and strain energy characteristics of fractured rock mass after grouting with different grouting parameters, the discrete element numerical simulation software PFC is used to study the mechanical and strain energy characteristics of limestone after filling the fractures with cement stones with different parameters. The numerical test results show that the displacement of the limestone grouting stone bodies with a longer prefabricated crack length decreases more obviously after grouting, and the strain energy, dissipation energy, and total input energy increase when the strengthened limestone sample is destroyed. The greater the stiffness of the cement stone, the easier the limestone grouting stone bodies will be destroyed from the position of the prefabricated crack. The internal friction angle of cement stones has little effect on the strength, deformation, and energy characteristics of limestone. Under the same cohesion, the number and the distribution range of secondary cracks of limestone grouting stone bodies with smaller prefabricated crack length are larger. However, with the increase of the tensile strength of the cement stones, the number, distribution range, and strength of the secondary fractures of the limestone grouting stone bodies are increasing. The longer the prefabricated crack is, the greater the influence of grouting parameters on the rock. The study provides a reference for the selection of reinforcement material parameters during grouting reinforcement.http://dx.doi.org/10.1155/2023/6044715 |
| spellingShingle | Hao Li Juntao Chen Qing Ma Dongxiu Jia Binbin Cheng Ziqun Fu Lei Liu Hongyun Guo Zhu Qu Jingping He Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code Geofluids |
| title | Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code |
| title_full | Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code |
| title_fullStr | Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code |
| title_full_unstemmed | Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code |
| title_short | Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code |
| title_sort | influence of different grouting parameters on mechanical and strain energy characteristics of different length fractured limestone in a coalfield north of yellow river a numerical study based on particle flow code |
| url | http://dx.doi.org/10.1155/2023/6044715 |
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