关键词: 综放工作面, 三角煤, 一次减架, 回撤工艺, 资源回收率

Abstract: To solve the problems following the recovery of triangle coal on fully-mechanized caving face in later period, taking NO. 25011 coal face in ShanZai Coal Mine as the subject investigated, we made a scheme that continuous recovery of short face formed by one-off retraction of supports after original terminal line was mined, and researched on retracting technology, location of auxiliary return airway and conterminousness technology with the face. The result showed that the conterminousness between auxiliary return airway and fully-mechanized caving face could be achieved accurately by field measurements and calculation, as well as leading guide holes. Depending on this technology, retracting time decreased to 25 days, and percent recovery of triangle coal increased to 59.2%.