In order to explore the change of rock mesostructure and its influence on permeability under different loads,NMR equipment was used to test the pore size distribution of cement mortar samples under 8 different loads.By analyzing the pore size distribution un-der different loading conditions,the variation rule of microscopic characteristics of samples under different loading conditions was ob-tained.Through the quantitative characterization data obtained in NMR,the influence of the microscopic characteristics on the permea-bility of the sample was studied,and the quantitative calculation model of the permeability and the proportion of each aperture was es-tablished.The results show that with the increase of load,the number of micropores with different diameters in the sample increases gradually,and the increase of small pores is smaller while that of large pores is larger.There is a negative correlation between the pro-portion of small pores and the permeability.Meanwhile,large pores relates positively to the permeability.
关键词
类岩石试样/核磁共振技术/不同载荷/细观结构/渗透率
Key words
rock-like sample/nuclear magnetic resonance technology/different loads/mesostructure/permeability
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