The stress relief method of hole diameter deformation was used to measure the stress distribution of the pillar structure in the mined area in a big phosphate mine.
采用孔径变形应力解除法，测量了某大型磷矿采空区中矿柱结构的应力分布规律；
The results present that the forging load decreases when a suitability diameter of relief-hole is chosen, but the function is not obvious.
结果显示，选择适当的分流孔尺寸可以降低成形载荷，但作用不很明显。
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