NIOSHTIC-2 Publications Search
Slack and Overload Rope Protection System.
Farley-HL; Fish-RB; Jeffcoat-RL; Hoadley-DL
Available for Reference At Bureau Libraries :327 pages
This report describes the development of an electronic system that detects unsafe slack and overload conditions in underground mine hoist ropes. The slack and overload rope protection system (sorps) includes a fail-safe load cell inserted between the rope and the conveyance and an accelerometer mounted on the conveyance. Signals from these transducers are telemetered via a radio link to the hoist control room where they are combined with drum speed and chair status in a microprocessor-based decision and display unit. Abnormally high external force levels are detected as discrepancies between rope and tension and cage acceleration; conveyance weight is inferred continuously. Hazardous conditions and general hoist status are displayed to the hoist operator. The system has been tested in a working mine for approximately 2 years. The report contains specifications, design data, and field test experience generated under the sorps program.
CP; Final Contract Report;
NTIS Accession No.
Available for Reference At Bureau Libraries
Foster-Miller Associates Inc.
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division