【摘要】 <正> 人们习惯地把液压支柱称作恒阻式支柱,把它的工作特性说成是一条近乎恒定不变的直线,支柱安全阀的特性曲线几乎成为液压支柱工作特性的唯一标志。本文将就液压支柱在井下的实际支护状态和工作特性提更多还原

【Abstract】 The paper mainly describes the rela- tionship between the actual underground support behaviour and the feature of constant resistance of the prop itself. A new concept, i. e the "rebound area" of the individual hydraulic prop, is proposed. The origin of the "rebound area" and its effect on the maintenance of the roof at the workings are preliminarily dealt with.更多还原