The stress relief method of holediameter 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;
2
The results present that the forging load decreases when a suitability diameter of relief-hole is chosen, but the function is not obvious.