Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic Gradient
Laboratory experiments on fluid flow through fracture are important in solving the fluid-in-rush problems that happen during the tunnel excavation. In order to study the mechanism of fluid flow through a rough-walled microfracture, fluid flow experiments were carried out and the fiber Bragg grating...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2019/4098496 |
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| author | Shuai Zhang Wei-Guo Qiao Yan-Zhi Li Wei-Jie Song Jun-Ling Qin Ji-Yao Wang |
| author_facet | Shuai Zhang Wei-Guo Qiao Yan-Zhi Li Wei-Jie Song Jun-Ling Qin Ji-Yao Wang |
| author_sort | Shuai Zhang |
| collection | DOAJ |
| description | Laboratory experiments on fluid flow through fracture are important in solving the fluid-in-rush problems that happen during the tunnel excavation. In order to study the mechanism of fluid flow through a rough-walled microfracture, fluid flow experiments were carried out and the fiber Bragg grating (FBG) strain sensors were applied to monitor the deformation of the microfracture surface during the seepage process. Considering the difficulty of collection of undisturbed rock samples from the deep locations, a methodology to simulate fluid flow through a fractured rock mass using analog materials containing a single fracture was developed. This method is easy to simulate the fluid flow through a fracture of certain aperture. Experimental data showed that Forchheimer equation could provide an excellent description of the nonlinear relationship between hydraulic gradient and flow velocity, and the variations of Forchheimer coefficients with joint roughness coefficient (JRC) were studied. It was found that the deformation of the microfracture surface subjected to seepage could be accurately captured by the quasi-distributed FBG strain sensors. The test results also demonstrated that the surface strain is significantly affected by hydraulic pressure. |
| format | Article |
| id | doaj-art-208bc9dff52349f7ae58213946a21e33 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-208bc9dff52349f7ae58213946a21e332025-02-03T07:26:10ZengWileyGeofluids1468-81151468-81232019-01-01201910.1155/2019/40984964098496Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic GradientShuai Zhang0Wei-Guo Qiao1Yan-Zhi Li2Wei-Jie Song3Jun-Ling Qin4Ji-Yao Wang5Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, ChinaLaboratory experiments on fluid flow through fracture are important in solving the fluid-in-rush problems that happen during the tunnel excavation. In order to study the mechanism of fluid flow through a rough-walled microfracture, fluid flow experiments were carried out and the fiber Bragg grating (FBG) strain sensors were applied to monitor the deformation of the microfracture surface during the seepage process. Considering the difficulty of collection of undisturbed rock samples from the deep locations, a methodology to simulate fluid flow through a fractured rock mass using analog materials containing a single fracture was developed. This method is easy to simulate the fluid flow through a fracture of certain aperture. Experimental data showed that Forchheimer equation could provide an excellent description of the nonlinear relationship between hydraulic gradient and flow velocity, and the variations of Forchheimer coefficients with joint roughness coefficient (JRC) were studied. It was found that the deformation of the microfracture surface subjected to seepage could be accurately captured by the quasi-distributed FBG strain sensors. The test results also demonstrated that the surface strain is significantly affected by hydraulic pressure.http://dx.doi.org/10.1155/2019/4098496 |
| spellingShingle | Shuai Zhang Wei-Guo Qiao Yan-Zhi Li Wei-Jie Song Jun-Ling Qin Ji-Yao Wang Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic Gradient Geofluids |
| title | Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic Gradient |
| title_full | Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic Gradient |
| title_fullStr | Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic Gradient |
| title_full_unstemmed | Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic Gradient |
| title_short | Laboratory Simulation of Flow through Rough-Walled Microfractures under High Hydraulic Gradient |
| title_sort | laboratory simulation of flow through rough walled microfractures under high hydraulic gradient |
| url | http://dx.doi.org/10.1155/2019/4098496 |
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