ABSTRACT
In this paper, the regulations of discontinuous deformation of upper surroundings, with a lot of joints, are analyzed by using numeric simulation. The nonlinear mechanic design theory about tunnel supporting is also presented. Through the study of coupling bracing theory between anchor and surroundings, the relationship between the coupling degree and bracing result is induced. At the same time, the effect of anchor-net to group anchors bracing is simulated. At last, the mechanism that the anchor-rope motivates the strength of surroundings in the distance in the key parts bracing technique is also simulated.
