EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF WATER-COOLED GRANITE UNDER HIGH TEMPERATURES WITHIN 600 ℃
XI Baoping1,2,ZHAO Yangsheng1,2
(1. College of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China; 2. Institute of Mining Technology,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)
Abstract:According to the experimental research on mechanical properties of water-cooled granite samples under high temperatures within 600 ℃,the degradation mechanism of thermal cracking of water-cooled granite is discussed. The results show that during water cooling process under high temperature,thermal cracking and thermal shock are found in granite samples due to drastic changes of temperature;and the mechanical properties of rock mass are degraded when temperature decreases gradually,such as supersonic wave,uniaxial compressive strength,tensile strength and elastic modulus. The following results are also presented:(1) when granite is cooled from high temperature,the supersonic wave is of negative exponential law with temperature;(2) the peak stress,the peak strain and the uniaxial compression strength of water-cooled granite are greatly affected;(3) high temperature with water cooling treatment has great influence on the tensile strength of granite;and (4) the elastic modulus with increasing temperature has negative logarithmic law for water-cooled granite samples.
郤保平,赵阳升,. 600 ℃内高温状态花岗岩遇水冷却后力学特性试验研究[J]. 岩石力学与工程学报, 2010, 29(05): 892-898.
XI Baoping1,2,ZHAO Yangsheng1,2. EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF WATER-COOLED GRANITE UNDER HIGH TEMPERATURES WITHIN 600 ℃. , 2010, 29(05): 892-898.