并根据洞室围岩产状与开挖几何边界的关系，提出围岩易破坏点的位置确定方法。

And according to the relation between rock occurrence of the underground chamber and geometrical boundary of excavation, the paper gave the method to positioning breakage.

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对几何边界条件的处理、单元网格的划分也会对面板的计算应力产生一定的影响。

The simulation of geometric boundary condition and the division of computation mesh also affect the computation result of the slab stress to some extent.

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文中选择了一个挠曲函数，它不但能满足所有自由边上的全部几何边界条件，而且也满足所有的内力边界条件。

We select a flex-ural function which satisfies not only all the geometric boundary conditions on free edges wholly but also the boundary conditions of the total internal forces.

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