本文用连续介质力学的理论分析了岩石屈服前的性状,导出了岩石介质的非线性弹性的本构方程并与试验资料进行了比较,结果令人满意。进而用非线性弹性取代一般帽盖模型中关于弹性区的线弹性假设,给山了一个新的非线性弹性—塑性硬化帽盖模型。 In this paper, the properties of rock before yielding are analyzed using the theory of continuum mechanics. The nonlinear elastic constitutive equation of rock medium is derived and compared with experimental data. The results are satisfactory. Then, nonlinear elasticity is used to replace the linear elasticity assumption in the general cap model for the elastic region, and a new non-linear elastic-plastic hardening cap model is given.