湘潭锰矿从1957年转入地下开采以来,经过三次扩建,年采矿生产能力持续保持20万吨左右,至1988年底累计采出矿石5264538吨。迄今对采矿方法已进行多次改进,技术装备水平也有所提高。一期区冷水冲段崩落法开采工作已于1974年结束,二期区 After the Xiangtan manganese ore was transferred from underground to underground in 1957, its annual mining production capacity has been maintained at about 200,000 tons after three times of expansion. By the end of 1988, a total of 52,64538 tons of ore have been recovered. To date, several improvements have been made to the mining method, and the level of technical equipment has also been raised. The first section of cold water red caving mining work has ended in 1974, the second period