摘要
运用有限元数值分析方法，详细研究了采高变化及关键层复合效应对关键层破断，即采场来压步距的影响，并建立了相应的采场来压步距估算公式图６，表５。
Influence of mining height and
mixed effect of key strata on broken length of the harden strata,or roof weighting span in longwall
face ,were investigated in detail by the finite element method. Formulas of the roof weighting span
were constructed.6figs.,5tabs.,4refs.
出处
《湘潭矿业学院学报》
1999年第1期1-5,共5页
Journal of Xiangtan Mining Institute
基金
国家自然科学基金
关键词
采动覆岩
关键层
破断
采场压力
压力步距
mining overlying strata,key
strata,broken,FEM,weighting of working face
