摘要
采用实验室相似模拟实验和离散元数值分析对散体介质锚拉支架的支护作用进行了系统深入地研究,研究表明:锚拉支架维护散体顶板时,在顶板中存在两个拱,第二拱处的水平应力比第一拱更大,两个拱上下水平应力均有明显的压力降;锚拉支架受力不大,此种受力状态的锚拉支架所支护的顶板达到了稳定状态,支护效果十分理想.图10,参7.
The mechanism of the truss supporting loose roof is studied through physical simulation tests and universal distinct element numerical simulation calculation. The results of research demonstrate two arches are appeared in roof. The horizontal stress of the second arch is larger than the first arch. Pressure obviously dropped up and down at each arch. The results also showed the truss' forces are little and loose roof is stability in the condition of truss supporting. The supporting effect is very reality.10figs.,7refs.
出处
《湘潭矿业学院学报》
2003年第1期17-20,共4页
Journal of Xiangtan Mining Institute
基金
煤炭科学基金项目资助(97采10205)
