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A study of failure in the rock surrounding underground excavationsCook, Neville G.W. January 1962 (has links)
A Thesis presented to the Department of Geophysics
of the University of the Witwatersrand,
Johannesburg / Violent failure of the rock surrounding under ground excavations
forms a major hazard and obstacle in deep-level mining. (Abbreviation abstract) / AC 2018
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