综放工作面上覆岩层滑落失稳规律是矿压显现研究的一个重要理论课题。为了研究综放工作面端部顶板的稳定性问题，基于端部顶板断裂力学理论，建立综放工作面端部顶板断裂岩块之间的铰链力学模型，研究端部顶板的稳定性，得到端部顶板块体结构的变形失稳规律。研究表明，弧形三角块顶板沿工作面端部倾向和走向的旋转下沉量不一致；随着阻力的提高，顶板的旋转下沉量逐渐减小。可见，对综放覆岩结构稳定性的研究为实现采场顶板安全控制提供了理论依据。

The sliding instability law of overlying rock layers in fully mechanized top-coal caving longwall face is an important theoretical topic in the study of mining pressure manifestation. In order to study the stability problem of the end roof of the fully mechanized caving face, based on the fracture mechanics theory of the end roof, a hinge mechanics model between the fractured rock blocks of the end roof of the fully mechanized caving face was established. The stability of the end roof was studied, and the deformation and instability law of the end roof plate body structure was obtained. The research results indicate that the rotation subsidence of the curved triangular block roof along the end of the working face is inconsistent. As the support resistance force increases, the rotational subsidence of the roof gradually decreases. The study on the stability characteristics of the overlying rock structure in the fully mechanized mining method provides a theoretical reference for achieving safe control of mining pressure in the mining area.