Problems associated with the use of rapid yielding hydraulic props.

Abstract

This report deals with the factors affecting the effective use of rapid yielding hydraulic props (RYHP’s) in the South African gold mines. Wherever possible, such factors have been quantified in an attempt to provide guidelines for obtaining the maximum benefit from the use of hydraulic prop systems. A literature survey indicated that a similar report was produced in the 1970’s. That report dealt with the introduction of hydraulic props into the gold mining industry. This report concentrates on the new generation “20 - 40 ton” hydraulic props. Similar problems are raised in both reports which indicate that these issues have not been effectively addressed.