| 致密岩石变形破坏过程中渗透率演化的试验研究 |
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| 引用本文： | 王欣,徐卫亚,贾朝军.致密岩石变形破坏过程中渗透率演化的试验研究[J].三峡大学学报(自然科学版),2013,35(2):29-32,41. |
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| 作者姓名： | 王欣 徐卫亚 贾朝军 |
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| 作者单位： | 河海大学岩土工程科学研究所,南京 210098;河海大学岩土力学与堤坝工程教育部重点实验室,南京 210098 |
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| 基金项目： | 国家自然科学基金项目，国家科技支撑计划，江苏省自然科学基金项目 |
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| 摘 要： | 为了研究致岩石在变形破坏过程中的渗透率变化特点，利用自适应全自动岩石三轴试验机对致密脆性的花岗片麻岩进行了不同孔隙压力下的渗透试验．试验结果表明：岩石不同变形阶段的渗流特性明显不同；在孔隙压力不大的情况下，岩石本身的裂隙发育情况与孔隙压力相比，对渗透率占主导作用；环向应变更能体现岩石发生软化屈服破坏的过程，在体现渗透率变化上响应更灵敏．在试验的基础上进一步探讨了应力-应变过程中渗流应力耦合的机理，分析了岩石细观力学性质对屈服破坏前期渗透率“突跳”的影响．
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| 关 键 词： | 岩石力学 渗流应力耦合 花岗片麻岩 三轴压缩试验 渗透率 |
Experimental Investigation on Permeability Evaluation During Compact Rock's Deformation and Failure Processes |
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| Wang Xin
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Xu Weiya
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Jia Chaojun.Experimental Investigation on Permeability Evaluation During Compact Rock's Deformation and Failure Processes[J].Journal of China Three Gorges University(Natural Sciences),2013,35(2):29-32,41. |
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| Authors: | Wang Xin Xu Weiya Jia Chaojun |
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| Institution: | 1,2(1.Geotechnical Research Institute,Hohai Univ.,Nanjing 210098,China;2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai Univ.,Nanjing 210098,China) |
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| Abstract: | In order to study the characteristics of rock permeability during their deformation and failure processes, permeability test about compact and brittle rock （granitic gneiss） under different pore pressures has been carried out on adaptive control automatic rock triaxial test system. The test shows that. 1） the rock has clearly unlike permeability during different deformation stages; 2） when the pore pressure is not high, rock fracture plays a leading role in seepage compared with seepage pressure; 3） circumferential strain is bet- ter in reflecting the process of rocks＂ failure and is more sensitive to response to the changing of permeability. On the basis of tests, the mechanism of seepage and stress coupling during stress-strain process is discussed further; the influence of mesomechanical quality of rock on the sudden increasing of permeability before fail- ure has also been analyzed. |
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| Keywords: | rock mechanics seepage and stress coupling granitic gneiss permeability triaxial compression test permeability |
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