将老顶岩层视为板结构,应用板的屈服线分析法研究各种开采边界条件下老顶岩层的周期性断裂规律及断裂型式的变化,建立两侧断裂跨度与来压步距的关系,按平面问题研究采场矿压的条件和范围以及板结构对沿空留巷的影响。研究表明,用屈服线分析法研究“岩板”的破坏是有效的。 Taking the old roof as the plate structure, the rule of periodic fracture and the change of the fracture type of the old roof strata under various mining boundary conditions were studied by using the yield line analysis method of the plate, the relationship between the fracture span and the pressure step on both sides was established, Study the conditions and scope of stope pressure in stope according to the plane problem and the influence of slab structure on gob-side entry retaining. Research shows that it is effective to study the failure of “rock slab” by yield line analysis.