基于极限平衡分析法的南张家金矿采空区稳定性评价

Stability Evaluation of Goaf in Nanzhangjia Gold Mine Based on Limit Equilibrium Analysis Method

摘要: 为了研究南张家金矿采空区对某线路工程建设的影响。本文在查明矿山开采时序、各中段采空空间形态与场区工程地质条件的基础上。采用了极限平衡分析法，多影响因子开展综合稳定性研判。最终分析划定了采空区影响范围，将研究区划分为不稳定区139,384 m²、基本稳定区36,859 m²、稳定区53,766 m²。并分区提出了注浆充填、桩基加固、地表沉降长期监测等针对性工程处置方案，为项目施工设计及后续施工管控提供技术依据。

Abstract: To study the impact of the abandoned mining area in the Nanzhangzhang Gold Mine on the construction of a certain railway line, this paper conducted a comprehensive stability assessment using the limit equilibrium method and multiple influencing factors. Based on the investigation of the mining chronology, the spatial morphology of each mining level, and the engineering geological conditions of the site, the affected area of the abandoned mining zone was ultimately delineated. The study area was classified into an unstable zone (139,384 m²), a basically stable zone (36,859 m²), and a stable zone (53,766 m²). Targeted engineering countermeasures such as grouting filling, pile foundation reinforcement, and long-term surface subsidence monitoring were proposed for each zone, providing a technical basis for project design and subsequent construction management.