颁布单位：[University of the Free State] |  颁布时间：2016 |  实施时间：2016 |  学科分类：[["Witwatersrand, Basin","Welkom, (Free, State, -)","Welkom, Goldfield","Welkom, Formation","UF1, �?Zone, 2","Tunnel, Failure, (-Collapse)","Gold, mines, and, mining, --, South, Africa--, Free, State","Tunneling","Rock, mechanics","Rock, deformation","Mine, safety","Dissertation, (M.Sc., (Geology))--University, of, the, Free, State,, 2016"]]

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