中文摘要：

为研究大倾角工作面放煤工艺及顶煤运动特征,采用相似材料模拟,依据放煤步距、放煤顺序、放煤方式、煤层倾角的不同构建了15种放煤模型,对比分析了不同放煤条件下对回采率、顶煤与矸石运动规律的影响。结果表明：工作面倾向采用由下向上单轮顺序放煤、回采方向采用一采一放的组合方式放煤,工作面回采率最高;随着煤层倾角增大,回采率逐渐降低。受煤层倾角影响,放煤漏斗呈非对称圆锥形,由上向下放煤漏斗为倒圆锥,由下向上放煤漏斗为正圆锥;而放煤漏斗轮廓受煤层倾角影响不大。由上向下放煤顶煤有滞留现象,而由下向上放煤则无顶煤滞留现象,下端头可尽可能多放煤,上端头要控制放煤。

英文摘要：

To analyze the top-coal caving process and movement characters in steeply dipping thick coal seam face, similar simulations were conducted and fifteen models were constructed according to different top-coal caving interval, top-coal caving sequence, caving methods and dipping, and the influence on recovery ratio and movement law of top-coal and gangue under different caving conditions was comparatively analyzed. The results show that：The combination mode of single sequence top-coal caving from lower to upper in dip direction and one-mining one-caving in the mining direction has the highest recovery ratio, and the recovery ration decreases with coal seam dip increasing. The caving is an non symmetrical cone due to the influence of coal seam dip, a turbination funnel type is presented when caving from upper to lower, whereas a positive conical funnel type is presented when caving from lower to upper. The coal seam dip angle has little effect on the caving funnel. The top-coal retention phenomenon of caving appears from upper to lower, but not appears from lower to upper, thus the lower-end should be caving as much as possible whereas the caving should be controlled on upper-end.