The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.
A class of nonconforming finite elements are applied to hyperbolic equation with semidiscretization on anisotropic meshes, the optimal error estimates are derived.
This paper presents and proves a discriminant theorem which is suited to examine the determinability of the discrete linear system,which shows that an outstanding issue of this field has been solved.