An uncertain positive correlation has been found between uniaxial compressive strength and elastic modulus of rocks. In order to make this kind of uncertainty unambiguous and let rocks’elastic modulus, which is more difficultly achieved,could be estimated with new correlations,based on the research of the differences between the texture and structure of rock samples, testing results derived from over 300 sedimentary rock samples were statistically analyzed.The results showed that the correlative degree between these two mechanical parameters was observably increased with the increase of the particular degree of the structural and textural classification.Hence,while studying the correlations between rocks’mechanical parameters,rock materials shouldn’t be considered as homogeneous materials any more.Accordingly, ten correlations between these two parameters were set up for different textural and structural classifications of sedimentary rock samples. Compared with similar research results in the past, the setting-up foundations of these correlation expressions were more rational.Furthermore,these expressions might be used to estimate the elastic modulus of almost all sedimentary rocks with the uniaxial compressive strength while lacking the essential experimental conditions or during preliminary application.
