A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Better roof support enhances safety
Research in roof-control methods led to better roof support at lower cost and prevention of roof falls in problem areas at U S Steel's Robena mine, Greene County, Pa; roof support procedures call for installation of 6-, 8-ft 3/4-in. high-strength bolts in place of shorter 5/8-in. units; other major items in roof-control program include use of sag bolts to measure accurately roof sag, research in resin-anchored bolts and application of compression pads and hydraulic cells to study bolt loading; roof-control committee investigates roof failures in bolted areas, determines causes of failures and recommends ways of improving roof control.
Better roof support enhances safety
Research in roof-control methods led to better roof support at lower cost and prevention of roof falls in problem areas at U S Steel's Robena mine, Greene County, Pa; roof support procedures call for installation of 6-, 8-ft 3/4-in. high-strength bolts in place of shorter 5/8-in. units; other major items in roof-control program include use of sag bolts to measure accurately roof sag, research in resin-anchored bolts and application of compression pads and hydraulic cells to study bolt loading; roof-control committee investigates roof failures in bolted areas, determines causes of failures and recommends ways of improving roof control.
Better roof support enhances safety
Coal Age
Coal Age ; 71
1966
6 pages
Article (Journal)
English
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Needed: better roof support at mine intersections
| Engineering Index Backfile | 1962
| British Library Online Contents | 2006
| Engineering Index Backfile | 1945