Relation between the shear and uniaxial strength of rock materials

The trap, in the translating formulation of the shear strength parameters(cohesion C, friction angle φ) and uniaxial strength parameters (tensile strength Q_t compressive strength Q_c) of rocks as Crude Kuroiwa, sandstone and etc., is discussed by comparing with the relative parameters measured from experiments. A statistical formula between the parameters of the deduced and measured uniaxial strength is represented, and a theoretical formula is derived and verified in the transmission process between the deduced and measured shear strength parameters.