根据现场观测,实验室试验,理论分析,对“三软”不稳定厚煤层放顶煤综采顶煤活动规律、顶煤稳定性、工作面端面冒落进行了分析研究。认为:“三软”不稳定厚煤层顶煤稳定性维护、端面冒落控制采取整体长顶梁、全封闭,及时移架是有效方法之一,它有利于工作面的高产、高效、安全。并可在相似开采条件中推广。 According to the on-the-spot observation, laboratory test and theoretical analysis, the law of top coal caving, the stability of top coal and the caving of working face caving in fully mechanized top coal caving mining face in “three soft” unstable thick seam are analyzed. It is considered that it is an effective way to maintain the stability of top coal in unstable thick coal seam with “three soft” and adopt full long-span beam as the control of end-face caving, which is fully closed and timely relocation. It is conducive to high productivity, high efficiency and safety of working face. And in similar mining conditions to promote.