The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High Temperatures
Seepage from the pores of sandstone exposed in deep mines is difficult to block by grouting. In this paper, the permeability evolution of four subcategories of sandstone with different pore structures under different confining pressures, pore water pressures and temperatures is analyzed by experimen...
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MDPI AG
2023-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/3/1771 |
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| author | Yanzhi Li Yue Wu Weiguo Qiao Shuai Zhang Xungang Li |
| author_facet | Yanzhi Li Yue Wu Weiguo Qiao Shuai Zhang Xungang Li |
| author_sort | Yanzhi Li |
| collection | DOAJ |
| description | Seepage from the pores of sandstone exposed in deep mines is difficult to block by grouting. In this paper, the permeability evolution of four subcategories of sandstone with different pore structures under different confining pressures, pore water pressures and temperatures is analyzed by experiments. (1) With increasing confining pressure, the permeabilities of the four tested subcategories of sandstone all decrease, but at different rates and to different extents. (2) With increasing pore water pressure, the permeability of subcategory I<sub>1</sub>, I<sub>2</sub> and II<sub>1</sub> sandstones increases linearly, while that of subcategory II<sub>2</sub> sandstone decreases following a power function under low confining pressures and tends to be stable under high confining pressures. (3) With increasing temperature, the permeabilities of the four sandstone subcategories decrease at different rates. (4) The orthogonal experimental results show that the confining pressure has the greatest influence on the permeability, followed by the water pressure and temperature. (5) The confining pressure, pore water pressure and temperature produce stress-strain in sandstone and thus change the sandstone pore structure and permeability. The permeability evolution of sandstones varies with pore structure. The findings of this study can inform the classified grouting of deep sandstone and optimize grouting parameters. |
| first_indexed | 2024-03-11T09:52:23Z |
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| id | doaj.art-bcfd90f2835d424d96d7ebbc17776e6b |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:52:23Z |
| publishDate | 2023-01-01 |
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| spelling | doaj.art-bcfd90f2835d424d96d7ebbc17776e6b2023-11-16T16:10:12ZengMDPI AGApplied Sciences2076-34172023-01-01133177110.3390/app13031771The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High TemperaturesYanzhi Li0Yue Wu1Weiguo Qiao2Shuai Zhang3Xungang Li4School of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Civil Engineering, Ludong University, Yantai 264025, ChinaSchool of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaSeepage from the pores of sandstone exposed in deep mines is difficult to block by grouting. In this paper, the permeability evolution of four subcategories of sandstone with different pore structures under different confining pressures, pore water pressures and temperatures is analyzed by experiments. (1) With increasing confining pressure, the permeabilities of the four tested subcategories of sandstone all decrease, but at different rates and to different extents. (2) With increasing pore water pressure, the permeability of subcategory I<sub>1</sub>, I<sub>2</sub> and II<sub>1</sub> sandstones increases linearly, while that of subcategory II<sub>2</sub> sandstone decreases following a power function under low confining pressures and tends to be stable under high confining pressures. (3) With increasing temperature, the permeabilities of the four sandstone subcategories decrease at different rates. (4) The orthogonal experimental results show that the confining pressure has the greatest influence on the permeability, followed by the water pressure and temperature. (5) The confining pressure, pore water pressure and temperature produce stress-strain in sandstone and thus change the sandstone pore structure and permeability. The permeability evolution of sandstones varies with pore structure. The findings of this study can inform the classified grouting of deep sandstone and optimize grouting parameters.https://www.mdpi.com/2076-3417/13/3/1771deep sandstonesandstone seepagepermeability evolutionpore structureshigh confining pressurehigh pore water pressure and high temperature |
| spellingShingle | Yanzhi Li Yue Wu Weiguo Qiao Shuai Zhang Xungang Li The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High Temperatures Applied Sciences deep sandstone sandstone seepage permeability evolution pore structures high confining pressure high pore water pressure and high temperature |
| title | The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High Temperatures |
| title_full | The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High Temperatures |
| title_fullStr | The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High Temperatures |
| title_full_unstemmed | The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High Temperatures |
| title_short | The Permeability Evolution of Sandstones with Different Pore Structures under High Confining Pressures, High Pore Water Pressures and High Temperatures |
| title_sort | permeability evolution of sandstones with different pore structures under high confining pressures high pore water pressures and high temperatures |
| topic | deep sandstone sandstone seepage permeability evolution pore structures high confining pressure high pore water pressure and high temperature |
| url | https://www.mdpi.com/2076-3417/13/3/1771 |
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