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本文分析了端面顶煤冒落的机理，分析了四连杆支撑掩护式放顶煤支架与顶煤之间的作用关系；叙述了一种新型放顶煤支架及其控制端面冒落的实用效果。
In this paper, the mechanism of roof caving of end coal is analyzed, and the action relationship between four-bar support caving caving support and top coal is analyzed. A new type of caving support and the control effect of caving of its control surface are described .