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Effect of confining presurre, pore pressure and specimen dimension on permeability of Yinzhuang Sandstone

Authors
Journal
International Journal of Rock Mechanics and Mining Sciences
1365-1609
Publisher
Elsevier
Volume
34
Identifiers
DOI: 10.1016/s1365-1609(97)00231-1
Keywords
  • Rock Permeability
  • Confining Pressure
  • Pore Pressure
  • Specimen Dimension
  • Complete Stress-Strain Path
  • Strain-Softening Region
  • Statistical Analysis
Disciplines
  • Design

Abstract

Abstract Tests on Yinzhuang Sandstone for measuring permeability under different confining pressure, pore pressure and specimen dimensions were carried out with an orthogonal experimental design Table L16(43), having 3 experimental factors and 4 levels. A total of 16 tests had been performed. The permeability of Yinzhuang sandstone was found as a function of the axial stress and strain strongly. But the effect of confining pressure, pore pressure and specimen dimensions on permeability was not obvious for most regions in a complete stress-strain path. Only in some individual regions, some individual factors discovered its own significant effect. For example, the confining pressure gave most significant influence on permeability in the strain-softening region, whereas the ratio of pore pressure to confining pressure discovered an obvious effect only on the value of highest permeability.

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