Abstract:In order to provide bases for parameters selection of stability analysis in Jinchuan nickel mine,which is one of the largest bases of metal resources,nonlinear elastoplastic finite element method is used for the sensitivity analysis of four mechanical parameters to the deformation of surrounding rocks of a tunnel in Jinchuan deposit Ⅱ. The analytical results show that the sensitivities of these parameters to deformation are different and the sequences of sensitivity,in a decreasing order,are the deformation modulus,the friction angle,the Poisson’s ratio,and the cohesion force. Especially,the sensitivities of deformation modulus and friction angle are comparatively higher than those of the two other parameters. Based on this result,more attentions should be paid to the deformation modulus and the friction angle in similar studies and analysis in Jinchuan deposit Ⅱ.