钛矿开采严重污染地表水，并使矿区生态环境普遍退化。
Mining ilmenite makes serious surface water pollution, and degenerates ecological environment.
本规划从矿区的总体利益出发，使矿区总体利益达到最优，在满足各种约束的条件下，寻求矿区生产的最佳方案。
This programming goes in quest of best scheme with the view of total benefit of Zhijing coal field under the condition that the different basic restraints are satisfied.
矿区井下电铁干扰使管道受到强烈腐蚀，采用改良型接地排流后收到了满意的效果。
The electrical interference in the underground mine area gives rise to serious corrosion of pipelines and the improved ground discharge is satisfactorily effective.
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