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Resume of roof support methods used in coal mines
Use of conventional supports, mining shield, yielding-type supports, roof bolts, yielding arches and roof bonding in United States mines.
Resume of roof support methods used in coal mines
Use of conventional supports, mining shield, yielding-type supports, roof bolts, yielding arches and roof bonding in United States mines.
Resume of roof support methods used in coal mines
Coal Min Inst America -- Proc
Barry, A.J. (author)
1961
11 pages
Article (Journal)
English
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Resume of roof support methods used in coal mines
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