The long-term performance of surface support liners for ground control in an underground limestone mine.
Pappas-DM; Barton-TM; Weiss-ES
Third International Seminar on Surface Support Liners: Thin Spray-On Liners, Shotcrete, and Mesh. Quebec City, Quebec, Canada: Department of Mining, Metallurgical and Materials Engineering, 2003 Aug; :1-22
During the past few years, the Pittsburgh Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) has been evaluating developments with surface support liners, which includes shotcrete and thin spray-on liners (also referred to as sealants, coolants, and membranes) 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 groundfalls. This paper 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 Laboratory 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.
Ground-control; Injuries; Ground-stability; Underground-mining; Stone-mines; Injury-prevention; Accident-prevention
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Research Tools and Approaches: Control Technology and Personal Protective Equipment
Third International Seminar on Surface Support Liners: Thin Spray-On Liners, Shotcrete, and Mesh, August 25-26, 2003