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New technology for hoist conveyance monitoring and analysis.

Authors
Beus-MJ; Ruest-M
Source
CIM Bulletin 2002 Oct; 95(1065):78-83
NIOSHTIC No.
20023472
Abstract
Many mines in Canada, the United States and South Africa are reaching the hoisting limit. Very little payload will be possible without compromising safety due to the excessive weight. It has been suggested (DeLorme, 2000) that one of the most attractive concepts to enable deeper hoisting is to reduce the allowable factor of safety in the wire rope. Researchers at the Spokane Research Lab are developing new technology to improve hoisting safety and productivity by providing new monitoring and analytical tools. A Shaft Conveyance Monitoring System (SCMS) has been developed which determines hoist rope end load, true conveyance position and acceleration, and rope safety factor, as well as other hoist operating parameters. This information is transmitted to the hoist operator display 20 times per second. Recent field measurements on 45 mm (1 in.) diameter hoist rope indicate that dynamic forces during loading of a 9000 kg (10 ton) skip could exceed the safety factor of the rope. To improve on the current understanding of the mechanical behaviour of hoist ropes, and to help interpret the results from field-testing of the SCMS, a new approach to computer modelling of stranded wire rope is also being developed. Particle Flow Code, PFC3D (Itasca, 1999), is used to simulate the structural behaviour of wire rope and the interaction between individual strands when the rope is subjected to static and dynamic end loading. Details of the SCMS, field results from the measured rope loads, and the results of numerical modelling on the wire rope will be discussed.
Keywords
Mining-industry; Monitoring-systems; Hoisting-equipment; Safety-measures; Safety-monitoring; Safety-practices; Mining-equipment; Accident-prevention
CODEN
CIBUBA
Publication Date
20021001
Document Type
Journal Article
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Issue of Publication
1065
ISSN
0317-0926
NIOSH Division
SRL
Source Name
The Canadian Mining and Metallurgical Bulletin
State
WA; MN
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