According to mining condition in Xinli mining area, the room and pillar filling method for large and thick ore-body is determined after research.
根据新立矿区开采技术条件，研究确定对厚大矿体采用分矿房矿柱分层充填法开采。
This has found a way out for the usage of soft Mn-ore with low-grade after research. It solves the problem of oxidized Mn with high-grade of the usage of Mn-sulphate for a long time.
经过本研究为低品位软锰矿的利用找到了出路，解决了硫酸锰生产长期需要使用高品位氧化锰矿的难题。
This has found a way out for the usage of soft Mn-ore with low-grade after research. It solves the problem of oxidized Mn with high-grade of the usage of Mn-sulphate for a long time.
经过本研究为低品位软锰矿的利用找到了出路，解决了硫酸锰生产长期需要使用高品位氧化锰矿的难题。
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