ABSTRACT
ABSTRACT: Studies on the effect of depth on physical and mechanical parameters of rock play an important role in understanding the deformation and failure of rock at great depths. In this paper, basalt specimens taken at seven different depths ranging from 410 m to 1010 m at the Datai Coal Mine, Beijing, were examined. Using MTS815 and RMTS150 rock mechanics test systems, some physical and mechanical parameters were obtained, including uniaxial compressive strength, uniaxial tensile strength, Young’s modulus, Poisson's ratio, cohesion, friction angle and rupture angle with uniaxial compression tests, conventional triaxial compression (CTC) tests and Brazilian tests. The research shows that uniaxial compressive strength, uniaxial tensile strength, elastic modulus, cohesion and friction angle increase linearly with increasing depth, while there is a linear decrease in Poisson's ratio with increasing depth, and that the rupture angle also changes with depth. Furthermore, the difference in volumetric strain of basalt specimens at different depths under CTC tests was obtained.
