综放开采顶煤的三个特征变形参数及多次损伤分析

Analysis on three feature deformation parameters and multi damage of top coal in fully mechanized caving mining

对顶煤变形的三个特征参数进行了分析,得出在不同条件下不同参数的变化规律,对顶煤的变形内在因素进行了更深入的研究,认为顶煤变形是一个多次损伤的过程,而多次损伤的关系就是顶煤与顶板的相互作用结果。在一定的顶煤变形、损伤因子、顶板和顶煤特性基础上,可以确定顶板与顶煤应力作用形式。而这些结论和观点是研究综放开采围岩活动和支架围岩关系的关键。

After the analysis on the three feature parameters of top coal deformation, the paper had the exchanged law with different parameters under the different conditions The paper had a deep study on the internal factors of the deformation in the top coal The paper holds that the top coal deformation was a multi damage process and the relationship of the multi damage was a mutual action result between the top coal and roof Under a certain top coal deformation, damage efficient, seam roof, and top coal features, the strain function formation between seam roof and top coal could be set Those conclusion and points are the key for the study of the relationship between the mining surrounding rocks and the support surrounding rocks