采矿与安全工程学报2016，Vol.33Issue(2)：208-213,6.DOI:10.13545/j.cnki.jmse.2016.02.003
大倾角厚煤层综放工作面放煤工艺及顶煤运动特征试验
Top-coal caving process and movement characters of fully mechanized caving face in steeply dipping thick seam
摘要
Abstract
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 influ-ence 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 phenom-enon 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.关键词
大倾角/放顶煤工作面/放煤工艺/煤矸运动Key words
steeply dipping/top-coal caving face/coal caving process/movement of coal and gangue分类
矿业与冶金引用本文复制引用
孙利辉,纪洪广,蔡振禹,张标,杨本生..大倾角厚煤层综放工作面放煤工艺及顶煤运动特征试验[J].采矿与安全工程学报,2016,33(2):208-213,6.基金项目
国家自然科学基金重点项目(51534002)；国家自然科学基金项目(51174015，51174070) （51534002）
