(1. 东北大学 资源与土木工程学院，沈阳 110004；
2. 矿冶科技集团有限公司，北京 102628)
摘 要: 采空区是影响矿山安全的重大危险源之一。针对金厂峪矿露天采场隐伏空区，首先分析了各空区工况条件下露天采场边坡失稳破坏特征，其次采用类比法、力学理论计算以及极限平衡法校核等，确定了隐伏空区预处理顶板安全厚度，形成了一种空区顶板安全厚度的综合判别法。结果表明：空区存在时出现应力集中现象和拉剪破坏，空区顶板失稳造成露天采场边坡局部滑塌，空区回填后边坡稳定性明显改善；当空区跨度为12 m时，顶板安全厚度取10.5 m合适，满足类比法及主要工程力学理论的安全要求。
关键字: 隐伏空区；破坏特征；顶板安全厚度；极限平衡法；综合判别法；空区治理
（1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China;
2. BGRIMM Technology Group, Beijing 102628, China）
Abstract:Goaf is one of major hazards affecting mine’s safety. In allusion to concealed goaves underneath Jinchangyu gold mine pit, the instability characteristics of pit slope under different working conditions with goaf were analyzed. Secondly, analogy method, mechanical theories and limit equilibrium method were used to determine the crown pillar safety thickness for pre-treatment, and a comprehensive discriminant method was formed. The results show that the stress concentration and tension-shear failure will occur when goaf exists, the roof instability can cause pit slope local collapse, but the slope stability can be obviously improved after backfilling goaves. When the goaf span is 12 m, the crown pillar safety thickness can be 10.5 m, which satisfies the safety requirements of analogy method and main engineering mechanical theories.
Key words: concealed goaf; failure characteristics; crown pillar safety thickness; limit equilibrium method; comprehensive discriminant method; goaf treatment
