摘要
运用数值计算方法分析了采场不同高度直接顶的变形破坏特征，提出直接顶的“临界高度”（ｈｃｒ）概念，将直接顶按临界高度进行分类，指出当直接顶高度Σｈ ≥ｈｃｒ 时，不能单纯以顶板下沉量来判别顶板是否稳定，而要综合考虑端面顶板的稳定性．在此基础上提出当Σｈ≥ｈｃｒ 时确定支架工作阻力应注意的问题．
Deformation and failure features at different heights of immediate roof in working face are analyzed by using numerical calculation method. The idea of “critical height” ( h cr ) of immediae roof, by which immediate roof can be classified is presented. If immediate roof height Σ h≥h cr , roof stability in tip to face area, instead of simple roof convergence, must be fully considered in judging whether roof is stable. So, attention must be paid to some problems in determining the support’s working resistance for Σ h≥h cr .
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2000年第1期73-77,共5页
Journal of China University of Mining & Technology
基金
国家自然科学基金!59734090
煤炭科学基金!97采20210
关键词
直接顶
临界高度
力学特性
工作阻力
支架
immediate roof
critical height
mechanical characteristic
working resistance
