LABORATORY STUDY ON PERMEABILITY OF RED SANDSTONE UNDER TRIAXIAL COMPRESSIVE STRESSES
The permeability of the red sandstone under the triaxial compressive stresses is presented in this paper. The effect of the triaxial stresses on the permeability of the red sandstone is analyzed. It is 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 decreased continuously with the increment of the longitudinal compressive strains. The permeability arrived at the lowest value and kept constant as soon as the peak stress was reached. The confining pressures and penetration pressures made explicit effects on the permeability behavior of the red sandstone. The higher confining pressure lead to the lower decreasing velocity of the permeability. The higher penetration pressure induced the lower permeability and the lower decreasing velocity.
red sandstone permeability triazial stresses confining pressure
C.P. Liu Q.Q. Duan
School of Civil & Environmental Engineering, University of Science and Technology Beijing, Beijing 1 Faculty of Mechanical and Electronic Engineering, China University of Petroleum(Beijing), Beijing, 1
国际会议
上海
英文
186-191
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）