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从岩石圈壳－幔组合结构出发，选择了大华北岩石围块体内一条NWW向连云港－银川的岩石圈壳－幔组合结构剖面，试图先从一个简单的力学模型开始，用二维有限元法得到岩石围（地壳和上地幔顶盖层）中的构造应力场的分布特征，从而解释板内地震与 岩石围亮－幔结构比值（R）相关的力学原因。
Based on the crust-mantle assemblage of lithosphere, a lithospheric crust-mantle assemblage section of NWW to Lianyungang-Yinchuan in the rock mass of North China is chosen, starting with a simple mechanical model and using the two-dimensional finite element method The distribution of tectonic stress field in the lithosphere (the crust and the upper mantle cap) is obtained, which explains the mechanics of the correlation between the intraplate earthquake and the ratio of lithic-mantle structure (R).