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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；分析了矿柱结构的承载能力，对其稳定性作出了评价
The stress distribution law of pillar structure in a large-scale phosphate rock mined-out area was measured by using aperture deformation stress relief method. The bearing capacity of pillar structure was analyzed and its stability was evaluated