Authors: Lu Gao Weiren Lin Dongsheng Sun Hongcai Wang
Publish Date: 2013/12/08
Volume: 47, Issue: 6, Pages: 1987-1995
Abstract
The experimental determination of anelastic strain recovery ASR compliances for three types of rocks granite marble and sandstone was performed in the laboratory Preloading of specimens for uniaxial compression creep tests was at 50 of the uniaxial compressive strength UCS for each rock type We obtained the shear mode Jast and volumetric mode Javt ASR compliances and calculated the ratio of Jast to Javt The Kelvin model for rock rheology was then applied in numerical simulations and the results were in good agreement with the measured data for Jast and Javt These results showed that both the magnitude and rate of increase of the ASR compliances are strongly dependent on the rock type and the values of the Jast/Javt ratio for a loading of 50 of the UCS showed a trend leading to different constants for each of the three rock types Further experimental and numerical analyses showed approximate powerlaw relationships between the ASR compliances at 50 of UCS and both the UCS and the tangential Young’s modulus at 50 of UCS E t50 These relationships may be useful for the preliminary estimation of ASR compliancesWe thank Lianjie Wang Bojing Zhu Junwei Cui and Wei Wang for their very helpful comments and suggestions during the preparation of this paper We gratefully acknowledge Giovanni Barla the editor of RMRE and two anonymous reviewers for their careful reading and constructive comments that helped us to improve this manuscript This research was supported by the Research Fund for the Doctoral Program of Higher Education of China Project No 20110022120002 and the Sinoprobe Deep Exploration in China Project SinoProbe07 Weiren Lin acknowledges the support of the GrantinAid for Scientific Research No 25287134 Japan Society for the Promotion of Science JSPS and 21107006 Ministry of Education Culture Sports Science and Technology MEXT Japan
Keywords: