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；
2
The stability of goaf-side roadways depends on not only the abutment distribution, but also the fracturing degree of the coal seam and rock strata alone the pillar width.
一侧采空巷道稳定性不仅与支承压力分布有关，而且与煤体受破坏程度有关。
3
The results show that the abutment pressure distribution on coal pillar is the direct reflection of abutment stress induced by mining on the interfaces of coal seam and immediate roof.