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The long-term performance of surface support liners for ground control in an underground limestone mine.
Pappas DM; Barton TM; Weiss ES
Surface support in mining. Potvin Y, Stacey TR, Hadjigeorgiou J eds. Nedlands, Australia: Australian Centre for Geomechanics, 2004 Jan; :157-166
During the past few years, the NIOSH Pittsburgh Research Laboratory has been evaluating developments with surface support liners, which includes shotcrete and thin spray-on liners (also referred to as sealants, coolants, and liners) from a ground control perspective. The proper selection and use of a surface support material can significantly enhance ground control, which may result in a decrease in worker-related injuries due to ground falls. This chapter evaluates the preliminary findings of a long-term underground study of various types of surface support liners and examines installation practices that are critical for an effective liner material application. The underground study utilizes NIOSH's Lake Lynn Experimental Mine to evaluate the long-term performance of several types of shotcrete and thin spray-on liner materials. Liner material performance to date was evaluated regularly over a 3-year period. Although the study is ongoing, critical mining practices were identified that may seriously affect the bond of the liner material to the mine roof and rib.
Mining-industry; Ground-control; Injuries; Ground-stability; Underground-mining; Safety-research; Hazards
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Book or book chapter
Potvin Y; Stacey TR; Hadjigeorgiou J
Surface support in mining