Safety Mining Technology for the Large Drop Orebody at the End of Collapse Pit in Gongchangling Iron Mine

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Safety Mining Technology for the Large Drop Orebody at the End of Collapse Pit in Gongchangling Iron Mine

REN Feng-Yu, SONG De-Lin, LI Hai-Ying, GONG Guo-Hui

Metal Mine . 2014, (10): 1 -4 .