巨厚砾岩下孤岛综放工作面顶板结构的动态稳定性分析

Study on the dynamic stability in isolated fully-mechanized sublevel caving face under weighty conglomerate rock

介绍了综放采场顶板结构形式及其运动的控制因素，利用结构稳定理论和强度理论，分析了义马巨厚砾岩下孤岛综放工作面顶板结构的稳定性，建立了初次来压和周期来压期间顶板结构的动态稳定性判据．通过调整顶煤放出率，实现控制顶板的稳定性，从而实现安全开采．

Introduced the roof structures and their movement characteristics in fully-mechanized sublevel caving face. Utilized the structure stability theory and the strength theory, the stability in isolated fully-mechanized sublevel caving face under weighty conglomerate rock inYima were analyzed, and the judginent rules of roof stability with the top coal＇s recovery ratio were established. The theoretical bases of designing the safe top coal＇s recovery ratio were provided according to different roof, and the safe roof controlling was achieved at coal mine.