Comparative Analysis and Application of the Rock Salt Deformation Parameter Determination Method

Two kinds of laboratory test methods to obtain rock salt deformation parameters are introduced using elasticity theory to deduce the formula for calculating the rock salt deformation parameters with conventional tri-axial compression tests. On this basis, comparative analysis of the deformation parameters - which are obtained by uni-axial and tri-axial compression tests to the rock salt specimen of certain rock salt cavern gas storage - shows that compared to using the uni-axial compression test method, the deformation parameters obtained through tri-axial compression test are much closer to the actual deformation parameters. If the deformation parameters of rock salt are obtained based on the uni-axial compression test, there is a greater impact on the result of elastic modulus and shear modulus when people take different sections of the stress-strain curve. Deformation parameters obtained in a perfectly elastic deformation section are most reliable. Research results provide a reference to reasonably determine the deformation parameters of rock salt.