Comprehensive Survey and Analysis of Underground Goafs in Open-pit Polymetallic Mine Cui Xiaorong1，Lin Moujin1，Zhang Weimin2，Zheng Bingxu1

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Comprehensive Survey and Analysis of Underground Goafs in Open-pit Polymetallic Mine Cui Xiaorong1，Lin Moujin1，Zhang Weimin2，Zheng Bingxu1

CUI Xiao-Rong, LIN Mou-Jin, ZHANG Wei-Min, ZHENG Bing-Xu

Metal Mine . 2015, (01): 128 -132 .