An experimental study on seepage behavior of sandstone material with different gas pressures

The seepage evolution characteristic of brittle rock materials is very significant for the stability and safety of rock engineering. In this research, a series of conventional triaxial compression and gas seepage tests were carded out on sandstone specimens with a rock mechanics servo-controlled tes...

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Bibliographic Details
Published inActa mechanica Sinica Vol. 31; no. 6; pp. 837 - 844
Main Authors Yang, Sheng-Qi, Huang, Yan-Hua, Jiao, Yu-Yong, Zeng, Wei, Yu, Qing-Lei
Format Journal Article
LanguageEnglish
Published Beijing The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences 01.12.2015
Subjects
Brittleness
Classical and Continuum Physics
Computational Intelligence
Deformation
Engineering
Engineering Fluid Dynamics
Evolution
Permeability
Phases
Research Paper
Rock (material)
Sandstone
Seepage
Theoretical and Applied Mechanics
伺服试验机
岩石材料
弹性变形
渗流特性
渗透压力
演化特性
瓦斯压力
砂岩
Rock mechanics
Permeability
Gas seepage
Sandstone
Volumetric deformation
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Summary:The seepage evolution characteristic of brittle rock materials is very significant for the stability and safety of rock engineering. In this research, a series of conventional triaxial compression and gas seepage tests were carded out on sandstone specimens with a rock mechanics servo-controlled testing system. Based on the experimental results, the relationship between permeability and deformation is firstly analyzed in detail. The results show that the permeabilityaxial strain curve can be divided into the following five phases： the phase of micro-defects closure, the phase of linear elastic deformation, the phase of nonlinear deformation, the phase of post-peak stress softening and the phase of residual strength. The seepage evolution characteristic is also closely correlated with the volumetric deformation according to the relationship between permeability and volumetric strain. It is found that the gas seepage pressure has a great effect on the permeability evolution, i.e. permeability coefficients increase with increasing gas seepage pressures. Finally, the influence of gas seepage pressures on the failure behavior of brittle sandstone specimens is discussed.
Bibliography:The seepage evolution characteristic of brittle rock materials is very significant for the stability and safety of rock engineering. In this research, a series of conventional triaxial compression and gas seepage tests were carded out on sandstone specimens with a rock mechanics servo-controlled testing system. Based on the experimental results, the relationship between permeability and deformation is firstly analyzed in detail. The results show that the permeabilityaxial strain curve can be divided into the following five phases： the phase of micro-defects closure, the phase of linear elastic deformation, the phase of nonlinear deformation, the phase of post-peak stress softening and the phase of residual strength. The seepage evolution characteristic is also closely correlated with the volumetric deformation according to the relationship between permeability and volumetric strain. It is found that the gas seepage pressure has a great effect on the permeability evolution, i.e. permeability coefficients increase with increasing gas seepage pressures. Finally, the influence of gas seepage pressures on the failure behavior of brittle sandstone specimens is discussed.
Rock mechanics · Sandstone · Gas seepage ·Volumetric deformation · Permeability
11-2063/O3
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0567-7718
1614-3116
DOI:10.1007/s10409-015-0432-7