Effect of Multistage Thermal Cracking on Permeability of Granite
Experiments on thermal cracking in granite sample were conducted through acoustic emission monitoring, and changes in permeability were concomitantly studied using 600°C 20 MN servo-controlled triaxial rock mechanics testing machine. Two granite samples, 200 mm in diameter and 400 mm long, from Shan...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/2960891 |
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| author | Zi-jun Feng Yang-sheng Zhao Peng Zhao Zhi-jun Wan |
| author_facet | Zi-jun Feng Yang-sheng Zhao Peng Zhao Zhi-jun Wan |
| author_sort | Zi-jun Feng |
| collection | DOAJ |
| description | Experiments on thermal cracking in granite sample were conducted through acoustic emission monitoring, and changes in permeability were concomitantly studied using 600°C 20 MN servo-controlled triaxial rock mechanics testing machine. Two granite samples, 200 mm in diameter and 400 mm long, from Shandong, China, were selected for these experiments. Both samples were heated up to 500°C at ambient pressure. We find that thermal cracking of large-scaled granite is discontinuous and exhibits multiple stages with temperature. In addition, the permeability exhibits the following characteristics: (a) it neither increases nor decreases monotonously with the temperature rising and it exhibits multipeak due to the multistage thermal cracking; (b) the temperature of permeability peak lags behind that of the drastic acoustic emission activities. Both AE counts and permeability dramatically increased after 300°C, which indicated serious thermal cracking occurred after 300°C. Permeability ratio is approximately linear with the ratio of AE cumulative counts. The results will be helpful for understanding the mechanism of geothermal reservoir construction and long-term evaluation of safety for nuclear waste geological disposal. |
| format | Article |
| id | doaj-art-434a05a3dc784451ac5acf62e5fcf699 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-434a05a3dc784451ac5acf62e5fcf6992025-02-03T05:49:30ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/29608912960891Effect of Multistage Thermal Cracking on Permeability of GraniteZi-jun Feng0Yang-sheng Zhao1Peng Zhao2Zhi-jun Wan3Department of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaDepartment of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaDepartment of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaSchool of Mines, China University of Mining Technology, Xuzhou, Jiangsu 221116, ChinaExperiments on thermal cracking in granite sample were conducted through acoustic emission monitoring, and changes in permeability were concomitantly studied using 600°C 20 MN servo-controlled triaxial rock mechanics testing machine. Two granite samples, 200 mm in diameter and 400 mm long, from Shandong, China, were selected for these experiments. Both samples were heated up to 500°C at ambient pressure. We find that thermal cracking of large-scaled granite is discontinuous and exhibits multiple stages with temperature. In addition, the permeability exhibits the following characteristics: (a) it neither increases nor decreases monotonously with the temperature rising and it exhibits multipeak due to the multistage thermal cracking; (b) the temperature of permeability peak lags behind that of the drastic acoustic emission activities. Both AE counts and permeability dramatically increased after 300°C, which indicated serious thermal cracking occurred after 300°C. Permeability ratio is approximately linear with the ratio of AE cumulative counts. The results will be helpful for understanding the mechanism of geothermal reservoir construction and long-term evaluation of safety for nuclear waste geological disposal.http://dx.doi.org/10.1155/2020/2960891 |
| spellingShingle | Zi-jun Feng Yang-sheng Zhao Peng Zhao Zhi-jun Wan Effect of Multistage Thermal Cracking on Permeability of Granite Advances in Materials Science and Engineering |
| title | Effect of Multistage Thermal Cracking on Permeability of Granite |
| title_full | Effect of Multistage Thermal Cracking on Permeability of Granite |
| title_fullStr | Effect of Multistage Thermal Cracking on Permeability of Granite |
| title_full_unstemmed | Effect of Multistage Thermal Cracking on Permeability of Granite |
| title_short | Effect of Multistage Thermal Cracking on Permeability of Granite |
| title_sort | effect of multistage thermal cracking on permeability of granite |
| url | http://dx.doi.org/10.1155/2020/2960891 |
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