地下工程设计需要确定岩体的力学参数,本文利用位移反分析法,根据开挖地下圆形隧洞时围岩位移的初始条件,反推出其中的瞬时弹性模量和地应力,并针对四种粘弹性力学模型给出了解的通式. Underground engineering design needs to determine the mechanical parameters of rock masses. This paper uses the displacement back analysis method to inversely derive the instantaneous elastic modulus and ground stress in accordance with the initial conditions of the displacement of the surrounding rock during the excavation of the underground circular tunnel. The elastic mechanics model gives the general formula for understanding.