把采场直接顶视为可变形介质，分析了其变形破坏特征．根据采场直接顶的承载能力将其分为非承载区、承载区和弱承载区，提出了采场直接顶刚度的概念及其计算方法．认为在采场支架与围岩系统中，由于直接顶介质的影响，支架阻力并不能限制老顶的最终位态，支架工作阻力和顶板下沉量的关系是老顶给定变形条件下支架和直接顶作用的结果． The stope is directly regarded as deformable medium, and its deformation and failure characteristics are analyzed. According to the carrying capacity of stope directly roof, it is divided into non-load-bearing area, load-bearing area and weak load-bearing area. The concept and calculation method of stope roof direct stiffness are proposed. It is considered that in the stope support and surrounding rock system, the support resistance does not limit the final position of the old roof due to the influence of the direct top medium. The relationship between the working resistance of the support and the amount of roof subsidence is that under the given deformation condition, Direct top effect of the results.