mine roof bolt

基本解释

The bolt truss were used to reinforce a layer concrete beam in order to simulate a mine roadway support in a mine layer roof.
对锚拉支架支护层状顶板进行了模拟试验和参数优化研究；
At the present, the design method of roof bolt support in mine seam roadway can be divided into three methods at home and broad.
根据峰峰矿区十几条煤巷锚杆支护实践，提出了一种用于板裂结构顶板的锚杆实用支护设计方法。
For supporting the broken roof of the stope of mechanized operation and its upper wall which comes into contact with fault plane, the tubular friction bolt is employed in Xincheng Gold Mine.
文中就新城金矿机械化作业采场的破碎顶板及与断层面接触的上盘，采用管缝式摩擦锚杆支护的有关技术问题作一探讨。