1) split wedge roof bolt
叉楔顶板锚杆
3) wedge pipe bolt for roof support
楔管式锚杆护顶
1.
The employment of dip retreat and wedge pipe bolt for roof support showed that the permissible exposed area of mine goaf increased from 50m2 to 258-500m2, thus greatly reduced the ore loss and dilution.
本文以理论研究为基础,密切结合生产实际,采用沿倾斜后退式回采顺序和楔管式锚杆护顶技术,使采空区允许暴露面积只有50m~2左右,扩大到258~500m~2,大幅度地降低了矿石损失与贫化,获得显著的经济效益。
4) wood roof pin
顶板木锚杆
5) roof bolt
顶板锚杆[栓]
6) roof bolt hole
顶板锚杆钻孔
补充资料:采用可拆卸预应力锚杆技术进行高层建筑基坑护坡
采用可拆卸预应力锚杆技术进行高层建筑基坑护坡
霹 采用可拆卸预应力锚杆技术进行高层建筑基坑护坡
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条