Abstract: Based on empirical equation,visualized chart and graph was created for estimating rock mass deformation modulus,which was greatly influenced by the degree of disturbance D.the value of D is related to influence degree and range.The quantitative formulas of D value is presented in the form of integral and distance normalization for the distributions of elastic modulus of rock core.The mechanical parameters of rock masses of deep tunnel was estimated based on geological strength index GSI,degree of disturbance D and strength criterion.With FLAC3D,these parameters were adopted to judge the law of stress,displacement,and plasticity range of rockmass.The relative error of below is 11% between calculated value and experimental value of plasticity range,and,15% for displacement values.The comparison of calculated results with measured data verified that the quantitative method is feasible and correct in rock engineering.