A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Use of torque wrench to determine load in roof bolts. Expansion-type 5/8-inch bolts
To determine torque load relationship, 5 makes of expansion shells and 2 types of bolts in 2 sandstone and 2 shale mine roofs tested; relationship was found to be 50 lb of load per ft-lb of torque for both regular and high strength bolts; statistical analysis showed that torque load relationship might have been affected by type of rock.
Use of torque wrench to determine load in roof bolts. Expansion-type 5/8-inch bolts
To determine torque load relationship, 5 makes of expansion shells and 2 types of bolts in 2 sandstone and 2 shale mine roofs tested; relationship was found to be 50 lb of load per ft-lb of torque for both regular and high strength bolts; statistical analysis showed that torque load relationship might have been affected by type of rock.
Use of torque wrench to determine load in roof bolts. Expansion-type 5/8-inch bolts
U S Bur Mines -- Report Investigations
Barry, A.J. (author) / Panek, L.A. (author) / McCormick, J.A. (author)
1956
13 pages
Report
English
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Use of torque wrench to determine load in roof bolts -- I. Slotted-type bolts
| Engineering Index Backfile | 1953
Use of torque wrench to determine load in roof bolts, part 2. Expansion-type 3/4 in. bolts
| Engineering Index Backfile | 1954
Anchorage testing of mine-roof bolts 2. Expansion-type, 3/4-inch bolts
| Engineering Index Backfile | 1956
Anchorage testing of mine-roof bolts. Expansion-type, 5/8-in. Bolts
| Engineering Index Backfile | 1957
Anchorage testing of mine-roof bolts -- 1: Slotted-type bolts
| Engineering Index Backfile | 1954