关键词: 预控顶, 缓倾斜矿体, 进路, 采矿成本

Abstract: The ore body and surrounding rock cleavage cracks of Zhaoanzhuang Iron Mine are devel⁃ oped，and the rock mass is broken and loose，which belongs to extremely unstable ore rock. The original upward horizontal layered cemented filling mining method is difficult to meet the current production re⁃ quirements. Based on the full study of the engineering geological conditions and mining technical condi⁃ tions of Zhaoanzhuang Iron Mine，the pre-controlled top upward horizontal entry subsequent filling mining method suitable for the mining technical conditions of Zhaoanzhuang Iron Mine was explored，and the cor⁃ responding mining technology and technical parameters were given. The field test shows that the method is safe and efficient and meets the requirements of low dilution loss mining. The amount of support engineer⁃ ing is reduced by 2/3，and the mining cost is reduced by 13.39 yuan/t，which has achieved good economic benefits.

Key words: pre-control roof, slightly inclined orebody, drift, mining cost