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我国锰矿石年生产量已达300万t以上,其中地下开采量约占总开采量的25％。国家“八五”规划中到1995年需要成品矿350万t,折合原矿约420万t,增长幅度较大。而我国锰矿埋藏较浅的资源因长期露天开采已逐年减少,大、中型规模的锰矿床均是埋藏较深的碳酸锰矿床,只适应于地下开采,因此,这种开采的比重将会逐年增加,但由
China’s annual output of manganese ore has reached more than 3 million t, of which underground mining accounted for about 25% of the total exploitation. In the “Eighth Five-year Plan” of China, the demand for finished mines will be 3.5 million tons by 1995, equivalent to about 4.2 million tons of ore, with a large increase. However, the shallow burial resources of China’s manganese ore have been reduced year by year due to long-term open-pit mining. The large and medium-sized manganese ore deposits are buried deep carbonate manganese deposits and are only suitable for underground mining. Therefore, the proportion of such mining will increase year by year But by