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Field Tests of Cable Bolts Using Instrumented King Wires.

Authors
Martin-L; Pakalnis-R; Curtin-R
Source
Presentation at the Canadian Institute of Mining, Metallurgy, and Petroleum--CIM 2000 Meeting, 2000, Mar 5-10 Toronto, Ontario, Canada :1-10
Link
NIOSHTIC No.
20021238
Abstract
Instrumented cable bolts developed at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health were used in conjunction with existing ground control to monitor rock mass loads at various field sites (T.G. Soda Ash, Getchell, Meikle, SSX, K-2, and Stillwater). Axial and shear loads were determined by strain gages to levels of instrument accuracy of +/-5 N or +/-5 microstrain as these loads were transferred to the instrumented cable bolts. These gages were 12.5 mm long and embedded into a remanufactured king wire that replaced the conventional king wire. Cable bolt performance, quality of grout, and installation techniques were also assessed. By using instrumented cables, a mine operator can determine axial load along the cable at predefined gage locations. By monitoring load on and displacement of the rock mass, more effective ground support can be selected and installed, which will lead to safer working conditions for miners.
Keywords
Mining-industry; Safety-measures; Ground-control; Injury-prevention; Accident-prevention; Safety-engineering
Publication Date
20000305
Document Type
Other
Fiscal Year
2000
NTIS Accession No.
NTIS Price
NIOSH Division
SRL
Source Name
Presentation at the Canadian Institute of Mining, Metallurgy, and Petroleum CIM 2000 Meeting
State
WA; WY
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