【摘要】 针对目前顶煤变形分区的研究现状,提出了膨(碎)胀率分区的概念和相应的计算方法,以现场实测资料为依据对顶煤的变形演化进程进行了量化分区,从理论上验证了不同厚度、硬度煤层放顶煤工作面顶煤的变形特点,为进一步量化煤体的可放程度提供了一种新方法。更多还原

【Abstract】 based on the overview of current situation and the data of field tests, a new concept of expansion (broken)-ratio division and its corresponding calculation are put forward to describe the process of top-coal changing in quantity. It not only gives proof to the phenomena of top-coal changing in different thickness or hardness seams, but provides 03the way to analyze the caving ability of top-coal in long wall sublevel caving mining.更多还原