Abstract：To investigate time-dependence behaviors of compacted specimens，loading rate-dependency of the specimen in uniaxial compression was investigated in this study. A rock specimen was，at first，completely fractured and then compacted in a steel cylinder. After pushed out of the cylinder，the compacted rock specimen was loaded in the alternating loading rate test，in which a single rock specimen was loaded at two alternating loading rates with a predetermined strain interval ，to obtain two stress-strain curves corresponding to the two loading rates to investigate the loading-rate dependency accurately. It was found that strength recovery was remarkable for Tage tuff，Kimachi sandstone and Kawazu tuff，the uniaxial compressive strengths increase with the maximum axial load in the compaction test. But strength recovery was poor for Sanjome andesite under the testing conditions. In the alternating loading rate test，stress fluctuated with alternating loading rates through the whole test. For the four rocks，when the maximum axial load in the compaction test was large，loading-rate dependency of uniaxial compressive strength of the compacted specimens was found to be consistent with the intact ones. When the maximum axial load in the compaction test was small，the extreme values ， of parameter n of loading rate-dependency were calculated. Parameter n of the intact specimen lied in the maximum and minimum ，and did not differ too much. The results indicate that it is expectable for strength recovery to occur for rocks in the excavation disturbed zone after properly being supported for a long time. And time dependency of fractured rock around an underground opening was similar to that of the intact surrounding rock mass. It will be reliable to use the same parameters in the constitutive equation for rocks in the intact and excavation disturbed zones，to simplify numerical simulation of the time dependency behaviors of underground structures.
雷 鸣，羽柴公博，福井胜则，大久保诚介. 开挖扰动区内岩石的压密特性和强度恢复性研究[J]. 岩石力学与工程学报, 2011, 30(S1): 2710-2719.
LEI Ming，HASHIBA Kimihiro，FUKUI Katsunori，OKUBO Seisuke. STUDY OF COMPACTION CHARACTERISTICS AND STRENGTH RECOVERY OF ROCK IN EXCAVATION DISTURBED ZONE. , 2011, 30(S1): 2710-2719.
SUTHERLAND H J，CAVE S P. Argon gas permeability of New Mexico rock salt under hydrostatic compression[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1980，17(5)：281-288.
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2011, Vol. 30 
