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根据已初步开发出的ＤＤＡ模型计算程序，分别就某工程试验洞洞挖和边坡明挖问题进行了计算，并与有限元结果进行了比较。两种开挖问题计算结果表明，ＤＤＡ模型计算结果在岩体开挖位移形态及位移量级上与有限元及实际位移监测结果都具有较好的可比性，说明该模型所反映的岩体开挖变形趋势是符合实际的，分别就ＤＤＡ模型应用于岩体洞挖和明挖计算时所存在的问题进行了讨论，包括岩体开挖荷载施加方式、块体界面特性模拟以及块体系统嵌入差别等问题。
According to the DDA model calculation program which has been initially developed, the digging and slope excavation of a project are calculated and compared with the finite element results. The calculation results of two excavation problems show that the results of DDA model have good comparability with the results of finite element and actual displacement monitoring in the displacement form and displacement of rock excavation, indicating that the rock mass open The tendency of excavation and deformation is in line with the actual situation. The problems existing in the application of DDA model in rock tunnel excavation and open cut calculation are discussed respectively, including the mode of rock excavation load application, the simulation of block interface characteristics and the embedding of block system Differences and other issues.