Investigation of Requirements and Performance of Safety Catches on Wire-Rope-Suspended,Man-Carrying Conveyances in United States Coal Mines.

摘要

The results of a comprehensive investigation of conveyance arrestment devices (safety catches) in United States coal mines are presented. Availability and use,performance,inspection,maintenance,testing,procedures,and regulatory requirements were investigated. Information was obtained from equipment manufacturers,mine operators,and regulatory-agency personnel,as well as from studies of domestic and foreign mining safety regulations. Traditional mine hoists and commercial elevators for mine use were investigated. Mine operators indicate little confidence in their conveyance arrestment devices,and manufacturers recognize a need to improve their products. In view of this, a set of application,design,actuation,stopping-performance,and testing and inspection criteria is presented as a guide to eliminating the inadequacies of these devices. (Author Modified Abstract)