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运用Ｄｒｕｃｋｅｒ－Ｐｒａｇｅｒ非线性模型，并计及了岩体边坡非均匀介质的情况，模拟分析了开挖步对开挖边坡内岩体二次应力场和边坡变形场的影响，给出边坡某些特征点处位移随开挖步的变化，同时讨论岩体内破损区随开挖步进行的扩展规律．
Using the Drucker-Prager nonlinear model and taking into account the inhomogeneous media of rock slope, the influence of excavation steps on the secondary stress field and slope deformation field of rock mass in excavation slope is simulated and analyzed. The displacement of some characteristic points along the slope changes with the excavation step, and the expanding law of the damaged area along the excavation step is discussed.