| 红砂岩三向应力状态下渗透性能的实验研究 |
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| 引用本文： | 刘彩平,段庆全. 红砂岩三向应力状态下渗透性能的实验研究[J]. 矿业研究与开发, 2009, 0(3): 9-11,29 |
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| 作者姓名： | 刘彩平 段庆全 |
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| 作者单位： | 北京科技大学,土木与环境工程学院,北京,10083;中国石油大学(北京)机电工程学院,北京,102249 |
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| 基金项目： | 教育部博士点新教师基金项目(20070008014) |
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| 摘 要： | 通过试验定量研究和分析了红砂岩三向受压变形破坏全过程的渗透性变化。实验结果表明,剪胀在破坏前发生,开始出现的应力为抗压强度的46%;随着纵向压缩应力的增加渗透流率减低,当达到峰值应力时渗透率降到最低值并保持稳定;渗透率受围压和渗透压差的影响显著,围压越高,渗透率的降低速度越低;渗透压差越大,渗透率越小,且下降的速率越大。
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| 关 键 词： | 渗透率 三向受压 红砂岩 液压伺服试验 |
Laboratory Study of Permeability of Red Sandstone under Three-Dimensional Stress |
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| Liu Caiping and Duan Qingquan. Laboratory Study of Permeability of Red Sandstone under Three-Dimensional Stress[J]. Mining Research and Development, 2009, 0(3): 9-11,29 |
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| Authors: | Liu Caiping and Duan Qingquan |
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| Affiliation: | 1.School of Civil & Environmental Engineering,University of Science and Technology Beijing,Beijing,100083,China;2.Faculty of Mechanical and Electronic Engineering,China University of Petroleum(Beijing),Beijing,102249,China) |
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| Abstract: | By tests,the quantitative study and analysis were made on the permeability changes of red sandstone in complete deformation and failure process under three-dimensional stress.The results shown that the shear-induced dilatancy occurred early prior to the final failure,the onset stress of dilatancy was approximate 46% of the ultimate compressive strength of the red sandstone.The permeability in the red sandstone decreased continuously with the increment of the longitudinal compressive stress,the permeability ... |
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| Keywords: | Permeability Triaxial compressive stresses Red sandstone Servo-controlled hydraulic mechanics testing |
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