A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Anchorage testing of mine-roof bolts. Expansion-type, 5/8-in. Bolts
Five makes of expansion type shells and two types of bolts (mild steel and high strength) were used in 30 tests made in sandstone and shale roof; results show that anchorage obtained in both sandstone and shale were stronger than either type of bolt; relationship for evaluating anchorage effectiveness of 5/8-in. diam expansion-type bolts.
Anchorage testing of mine-roof bolts. Expansion-type, 5/8-in. Bolts
Five makes of expansion type shells and two types of bolts (mild steel and high strength) were used in 30 tests made in sandstone and shale roof; results show that anchorage obtained in both sandstone and shale were stronger than either type of bolt; relationship for evaluating anchorage effectiveness of 5/8-in. diam expansion-type bolts.
Anchorage testing of mine-roof bolts. Expansion-type, 5/8-in. Bolts
U S Bur Mines -- Report Investigations
Barry, A.J. (author) / Panek, L.A. (author) / McCormick, J.A. (author)
1957
8 pages
Report
English
© Metadata Copyright Elsevier B. V. All rights reserved.
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