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An analysis of fiber-reinforced round panel strengths and comparison to wire mesh bag strength.

Authors
Martin-L; Seymour-B; Clark-C; Stepan-M; Pakalnis-R; Roworth-M; Caceres-C
Source
2010 SME Annual Meeting and Exhibit, February 28 - March 3, Phoenix, Arizona, Preprint 10-140. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2010 Feb; :1-6
Link
NIOSHTIC No.
20036558
Abstract
Researchers at National Institute for Occupational Safety and Health (NIOSH) are investigating how fiber-reinforced shotcrete mix designs can be extrapolated from proven designs employing wire mesh. This paper explains the results of round determinate panel tests and relates the flexural strength and toughness of fiber-reinforced shotcrete to known energy absorbing properties of wire mesh. The energy absorbed with central deflection is strongly influenced by the amount of fibres. The higher the energy absorption the more load cracked shotcrete can support. Two types of fiber-reinforced shotcrete were investigated, one with steel fiber and another with polyfiber. The residual load supported in Round Determinate Panel Tests can be matched with the strength of wire mesh, thus providing equivalent bag strength values for fiber reinforced shotcrete panels. There is also evidence of a panel crack width comparison to the load holding capabilities of the fiber in the shotcrete mixes. In practice, this provides designers with a method for comparing the ground support provided by fiber-reinforced shotcrete with that supplied by wire mesh.
Keywords
Accident-prevention; Adhesive-bonding; Cements; Coal-mining; Exposure-assessment; Injury-prevention; Mine-workers; Mining-industry; Rock-falls; Rock-mechanics; Underground-mining
Publication Date
20100228
Document Type
Conference/Symposia Proceedings
Fiscal Year
2010
NTIS Accession No.
NTIS Price
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
2010 SME Annual Meeting and Exhibit, February 28 - March 3, Phoenix, Arizona, Preprint 10-140
State
PA; AZ
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