平煤一矿戊组煤层为主采煤层 ,井田范围内大部分区域戊8、戊9、戊10 煤层合层 ,成为戊8- 10 复合厚煤层 ,各分层间有夹矸层 ,夹矸厚度 0～ 0 .6m。研究表明分层综采优越于放顶煤开采 ,在矿井二水平戊一采区下山阶段进行推广应用后 ,矿井共增收节支 3.88亿元 ,多采出煤炭 10 3.7万t ,技术经济效益明显 The Pingdingshan No. 1 pentameter coal seam is the main coal seam. Most of the area in the minefield is pentaheptate, pentaheptano-9 and eta-10 coal seam layers, forming a pentagonal 8- to 10-thick composite seam. Gangue thickness 0 ~ 0 .6 m. The research shows that the layered fully mechanized mining is superior to the top coal caving mining. After being popularized and applied in the descending phase of the second mining level, the first mining and mine mining area, the total revenue of the mines was reduced by 388 million yuan and 103.7 million tons of coal were mined. The technical and economic benefits were obvious