关键词: 塑性区, 矿柱, 稳定性分析, 充填体, 应力特征, 留矿法

Abstract: Aiming at the characteristics of a copper mine that is dominated by steep ore bodies, medium-thickness ore bodies, high grade and stable surrounding rock, the short hole shrinkage and subsequent filling mine method is selected. At the same time, the mining technology of the mining method is described. In order to ensure the reliability and rationality of safe use of the mining method in the production process, the geotechnical FLAC3D software is used to stabilize the stope structure parameters with a length of 44m, a pillar 6m wide, a top and bottom pillar 12m high, and a middle section height 145m. Simulation results show that the stope structural parameters have certain feasibility, rationality and security in the case of filling; and the height of roof plastic zone generated by the roof after segmented mining is limited, which indicates that the safety of mining with the short hole shrinkage followed by filling method is guaranteed and will cause no safety impact on the roof. At the same time, it proves that the mining method has the advantages of safety, reasonableness and high efficiency. The research results provide a theoretical basis for the safe and efficient production of the mine.

Key words: plastic zone, pillar, stability analysis; filling body, stress characteristics, shrinkage method