Experimental research on aperture evolution of single granite fracture under stress-chemical solution permeation condition
文献类型：会议论文
| 作者 | Yang, J. B.; Feng, X. T.; Shen, L. F.; Pan, P. Z. |
| 出版日期 | 2012 |
| 会议日期 | OCT 14-16, 2011 |
| 会议地点 | Beijing, PEOPLES R CHINA |
| 页码 | 221-227 |
| 英文摘要 | Experiments of granite with single fracture under constant triaxial stress and chemical solution seepage are carried out to study the evolution of fracture aperture (and related permeability) under stress-chemical solution permeation. Experimental results show that with both acid and alkaline solution seepage the fracture aperture decreases monotonically. The rapid initial closure happened during the first 300 hours of the tests, followed by slowing closure till a stable final aperture, which is obviously greater under acid flow than that under alkaline flow. The ion concentration of solution from the outlet was recorded during the test, and the 3D laser scan and mineral morphology of fracture surface before and after test were also measured. Under acid solution flow, the SiO2 and Al3+ concentrations of outlet solution increase with time, indicating that the minerals (mainly feldspar and mica) at contact surface and the free surface are dissolved constantly. Under alkaline solution seepage, the SiO2 and Al3+ concentrations of outlet solution are significantly lower than those under acidic flow, indicating that the pressure dissolution at contact points leads to the closure of fracture so that the reaction ceases gradually with the increase of contact area. The results confirm that the different evolutions of fracture aperture are due to the competition between the contact surface solution and free surface dissolving. |
| 源文献作者 | Cai, M |
| 会议录 | ROCK MECHANICS: ACHIEVEMENTS AND AMBITIONS
 |
| 会议录出版者 | CRC PRESS-TAYLOR & FRANCIS GROUP |
| 会议录出版地 | BOCA RATON |
| 语种 | 英语 |
| WOS研究方向 | Engineering |
| WOS记录号 | WOS:000347395400039 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4657]  |
| 专题 | 岩土力学所知识全产出_会议论文 国家重点实验室知识产出_会议论文 |
| 作者单位 | Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Yang, J. B.,Feng, X. T.,Shen, L. F.,et al. Experimental research on aperture evolution of single granite fracture under stress-chemical solution permeation condition[C]. 见:. Beijing, PEOPLES R CHINA. OCT 14-16, 2011. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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