Abstract:Basic mechanical behaviors of rocks at different temperatures and under different moisture states are required for the investigation on studying and designing rock engineering in cold regions. Two typical rocks,i.e. red sandstone and shale sampled from Jiangxi Province and Hubei Province in China,respectively,are tested by uniaxial and triaxial compressive tests at different temperatures ranging from -20 ℃ to 20 ℃ and in dry and fully saturated states. The test results show that,the uniaxial compressive strength and elastic moduli of these two types of rock increase with the temperature dropping between -20 ℃ and 20 ℃ in general,but the influence of temperature on red sandstone is greater than that on shale. Moreover,moisture state has the key influence on the compressive strength of rock. The cohesive strength and inner friction angle achieved by the triaxial compression tests increase with the decreasing of temperature with range of -10 ℃ to 20 ℃,and the red sandstone exhibits larger dependence on temperature. According to these test results,some valuable curves are obtained;and relevant expressions between mechanical parameters and temperature are formulated.