And NMM is a promising numerical method to solve both the continuous and discontinuous deformation problem of rock mass and to unify the finite element method(FEM),discontinuous deformation analysis(DDA) and analytic method.

• 主要研究了基于有向图理论的流形元系统节点编码的优化、对应稀疏矩阵的压缩存储与流形元总体控制方程的动态连通性分析、分片直接求解法及流形元接触的开一合迭代方法，并开发了对应的e++类(elass Solver)。