隧洞围岩中岩块稳定动力学分析

按时间离散分析了单一岩块的稳定性，即岩块受力松支引起形成岩块的充填物的变形和破裂，使充填物作用在岩块上的力不断改变，设在每一时间步内岩块沿直线路径运动，根据岩块的运动规律和结构面的破裂状态判断是否结束岩块的运动分析，于是判断出岩块的稳定性，该方法分析计算量小，结论合理。

Dynamic Analysis of Rock Block Stability for Confining Rocks in Tunnels

The stability of single rock block is analyzed by the discrete time step method, that is, the force that the joint filler acts on a block makes the block move, and the movement causes deformation and rupture of the joint filler, which further results in continuous change of the force acting on the block. Under the hypothesis that the block moves in a straight line in every time step, the ending of analysis of the block movement is determined according to the movement law of blocks and rupture states of joint surface, thus, the stability of the block is judged. The present method can shorten calculation time, and the result is reasonable.