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Evaluation of tri-sets for roof-fall areas.

Authors
Allwes-RA; Mangelsdorf-CP
Source
New Technology in Mining Health & Safety: Proceedings of the Symposium held at the SME Annual Meeting, Phoenix, Arizona, February 24-27, 1992. Khair AW, ed., Littleton, CO: Society for Mining, Metallurgy, and Exploration, 1992 Feb; :263-276
Link
NIOSHTIC No.
10011355
Abstract
At the request of the U.S. Department of Labor, Mine Safety and Health Administration (MSHA), the U.S. Bureau of Mines evaluated the suitability of using tri-sets for protecting mine personnel in roof- fall-prone areas. A steel-set arch provided by MSHA served as a basis for evaluating the performance of the tri-sets. All tests and analyses were conducted according to the arch canopy test and design procedures developed by the Bureau. Theoretical resistance functions were established for the steel-set arch and tri-set and were representative of their experimental behavior. The resistance functions were used to determine the energy absorption capacity of the structures and to predict their dynamic response to impact loading. The dynamic tests demonstrated that the arch canopy design procedure is appropriate for tri-sets and yields conservative designs for both steel-set arches and tri-sets. As a result of this work, it is recommended that tri-sets may be considered for protection against roof falls, provided that the arch canopy design procedure is utilized for each application and that the principles underlying the design procedure are understood.
Keywords
Mining-industry; Underground-mining; Rock-falls; Engineering-controls; Control-technology
Publication Date
19920224
Document Type
OP; Conference/Symposia Proceedings
Editors
Khair-AW
Fiscal Year
1992
NTIS Accession No.
NTIS Price
ISBN No.
9780873351089
Identifying No.
OP 76-92
NIOSH Division
PRC
Source Name
New Technology in Mining Health & Safety: Proceedings of the Symposium held at the SME Annual Meeting, Phoenix, Arizona, February 24-27, 1992
State
PA
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