吴集铁矿（北段）二步骤矿柱回采方案的探讨

吴集铁矿（北段）-200 m中段以上采场采用浅孔留矿嗣后充填法开采。一步骤采场充填后，根据实际开采条件，提出适合的3种二步骤矿柱回采的方案，从如何安全、经济、高效且最大程度地回收资源等方面考虑，探讨适合吴集铁矿（北段）矿柱回采的采矿方法和采矿工艺技术参数。对类似开采条件矿山的矿柱回采具有一定的借鉴意义。

Discussion on Second-step Pillar Recovery Mining Method of Wuji Iron Mine(North Section)

The shallow-hole shrinkage mining method with delayed filling was used for above the -200 m layer in Wuji iron mine(north section).Three suitable second-step pillar extraction mining methods is proposed according to the actual mining conditions after the first-step filling of stope，and the appropriate pillar recovery mining method and the technical parameters of mining technology to Wuji iron mine(north part) are investigated through the consideration on how to recover resources securely，economically，efficiently，and in the maximum extent.It can give a certain reference for exploiting to the mine with similar mining conditions.