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Identify and Evaluate Lightweight Support Substitutes.
NTIS: PB/80-190580 :63 pages
The objective of this program was to identify and evaluate superior, lightweight substitutes for selected coal mine roof support concepts such as crossbars, posts, and crib blocks. Engineering analysis and concept design identified, through tradeoff studies, that some materials are promising from a technical standpoint, as support substitutes such as e-glass reinforced polyester resin, high- strength low-alloy steel, aluminum, and very high early strength (vhe) cement. An economic analysis indicates that none of the lightweight substitutes are economically competitive with wood on an initial cost basis; however, in terms of life cycle costs based on current dollars, the high-strength, low-alloy steel appears competitive for crossbars, and the vhe cement and e-glass-resin appear competitive for posts.
CP; Final Contract Report;
NTIS Accession No.
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division