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[1]骆兴科,章光,刘明泽,等.CO2/水孔流作用下砂岩真三轴应变分形特征研究[J].中国安全生产科学技术,2017,13(9):47-52.[doi:10.11731/j.issn.1673-193x.2017.09.007]
　LUO Xingke,ZHANG Guang,LIU Mingze,et al.Study on true triaxial strain fractal characteristic of sandstone under effect of CO2/water pore fluid[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(9):47-52.[doi:10.11731/j.issn.1673-193x.2017.09.007]
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CO2/水孔流作用下砂岩真三轴应变分形特征研究()
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年9期
页码:
47-52
栏目:
学术论著
出版日期:
2017-09-30

文章信息/Info

Title:
Study on true triaxial strain fractal characteristic of sandstone under effect of CO2/water pore fluid
文章编号:
1673-193X(2017)-09-0047-06
作者:
骆兴科1 ; 章光1; 2; 刘明泽1; 2 ; 李小春3 ; 胡少斌4 ; 张强3
1. 武汉理工大学 资源与环境工程学院, 湖北 武汉 430070；2. 安全预警与应急联动技术湖北省协同创新中心，湖北 武汉 430070；3. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071；4. 河海大学土木与交通学院，江苏 南京 210098）
Author(s):
LUO Xingke1;  ZHANG Guang1; 2;  LIU Mingze1; 2;  LI Xiaochun3;  HU Shaobin4;  ZHANG Qiang3
(1.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan Hubei 430070, China;?2.Hubei Collaborative Innovation Center for Early Warning and Emergency Response Technology, Wuhan Hubei 430070, China;3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan Hubei 430071, China;?4.College of Civil and Transportation Engineering, Hohai University, Nanjing Jiangsu 210098, China)
关键词:
应变分形; CO2; 水; 真三轴试验; 砂岩
Keywords:
strain fractal;  CO2;  water;  true triaxial test;  sandstone
分类号:
TU452
DOI:
10.11731/j.issn.1673-193x.2017.09.007
文献标志码:
A
摘要:
以砂岩为主要研究对象，以CO2、水为孔隙流体介质，通过真三轴压缩试验得到不同孔流作用下应力应变数据，分析并比较了砂岩受力破坏各个阶段中应变分形曲线特征。研究结果表明:分形维数的突变与应变的突变具有一致性，分形维数的范围与最大值的排序为：干燥>CO2>水。干燥砂岩的应变分形变化规律为：在孔隙压密阶段，分形维数增大；弹性阶段，分形维数略有上升；屈服阶段，分形维数波动较大；峰后阶段，分形维数减小。含水砂岩和含CO2砂岩的应变分形规律具有共性和差异性。共性表现在孔隙压密阶段和峰后阶段：孔隙压密阶段两者分形维数减小，峰后阶段两者分形维数增大。差异性体现在中间阶段：含水砂岩的分形维数在很小的范围内波动，而含CO2砂岩波动较大。试验结果可以在一定程度上定量地反映岩石受力破坏全过程特征，同时给岩石力学行为与破坏机理研究带来新思路。在实际工程中，岩石结构的应变分形结果对其稳定性分析及预测具有指导意义。
Abstract:
aking the sandstone as the main research object, and CO2 and water as the pore fluid medium, the stress and strain data of sandstone under the effect of different pore fluid were obtained by the true triaxial compression tests, and the characteristics of stain fractal curve in each stage of force and failure for sandstone were analyzed and compared. The results showed that the mutation of fractal dimension was consistent with the mutation of strain, and the range and maximum value of fractal dimension were in the order of dry, CO2 and water from large to small. The change laws of stain fractal of dry sandstone were: the fractal dimension increased in the pore compaction stage, increased slightly in the elastic stage, fluctuated greatly in the yield stage, and decreased in the post-peak stage. The strain fractal laws of water-bearing sandstone and sandstone containing CO2 had the characteristics of generality and difference. The generality showed in the pore compaction stage and the post-peak stage, namely both the fractal dimension decreased in the pore compaction stage and increased in the post-peak stage. The difference showed in the middle stages, namely the fractal dimension of the water-bearing sandstone fluctuated in a small range, while the fluctuation of the sandstone containing CO2 was larger. The test results can quantitatively reflect the whole process characteristics of the rock force and failure in a certain degree, and bring new ideas to the study on rock mechanics behavior and failure mechanism. In the practical engineering, the strain fractal results of rock structure have guiding significance for its stability analysis and prediction.

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备注/Memo

备注/Memo:
国家“十三五”重点研发计划重点专项项目（2016YFC0802509）
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