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凤凰山铜矿阶段矿柱为难采矿体。运用地压监控技术，采用分层分区充填采矿法，取得了较好的技术经济效果。
Fenghuangshan copper pillar pillars difficult to mining body. The use of pressure monitoring technology, the use of hierarchical zoning mining method, and achieved good technical and economic results.