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在已经开发的3D-FSM·DDM间接边界元数值模拟系统的基础上,进行含预紧力端锚固锚杆支护功能的数值模拟系统研究与开发。算法的基本思想是:根据岩体与锚杆重合部分两端点的位移差与锚杆相应部分两端点的轴向位移差相等,补充方程数量,并与其他单元在边界条件下联立求解全部虚拟应力未知量;求取后利用其进一步求解围岩任意点的应力、位移及稳定性。所开发的数值系统与FLAC3D数值模拟系统进行了比较,验证本边界元系统的可靠性。开发后的边界元数值模拟系统可广泛应用于矿山、隧道等大型岩土工程的围岩稳定性分析。
Based on the 3D-FSM · DDM indirect boundary element numerical simulation system that has been developed, the numerical simulation system research and development of pre-tensioned anchorage bolt support is carried out. The basic idea of the algorithm is: according to the displacement difference between the two ends of the coincidence part of the rock mass and the anchor rod is equal to the axial displacement difference between the two ends of the corresponding part of the anchor rod, the number of equations is added and solved simultaneously with other units under the boundary conditions Unknowns; after obtaining, further solving the stress, displacement and stability of any point of surrounding rock. The developed numerical system is compared with FLAC3D numerical simulation system to verify the reliability of this boundary element system. The developed boundary element numerical simulation system can be widely applied to the analysis of surrounding rock stability of large-scale geotechnical projects such as mines and tunnels.