roof-bolt drill 顶板锚栓钻机
roof bolt plate 锚杆垫板
roof bolt hole 顶板锚杆钻孔
split wedge roof bolt 叉楔顶板锚杆
slotted roof bolt 开缝顶板锚杆
sliding wedge roof bolt 滑楔式锚杆
slotter type roof bolt 开缝顶板锚杆
cemented roof-bolt 钢筋混凝土锚杆
It is verified that roof bolt broken problem may be solved with new type's thick tail bolt.
证明了新型粗尾锚杆可以解决顶板锚杆破断问题。
The paper makes an analysis of the stresses on split-set roof bolt, and gives results of in-situ tests.
本文对管缝式锚杆进行了受力分析，并介绍了现场试验研究结果。
There are many kinds of strata in roof bolt hole. Proper using and choosing are available for increasing comprehensive benefit.
锚杆钻孔所遇岩层种类较多，合理地选择锚杆钻头类型有利于提高综合效益。
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