| 1. | Roof bolt plates for mining and tunnel support
矿井和遂道支撑用防护锚栓板 |
| 2. | Research and development of new drilling bit for roof bolt driller
锚杆钻机新型钻头的研制 |
| 3. | Galvanized mild steel roofing bolt and nut
镀锌瓦楞螺栓螺帽 |
| 4. | Technique of combined supporting of roof bolting with bar and wire mesh in coal roadway
煤巷锚梁网组合支护技术的研究与应用 |
| 5. | Expansion type roof bolt
膨胀式锚杆 |
| 6. | Application of the technology of roof bolting with bar and wire mesh in the zhangji coal mine
三维地震勘探在王庄煤矿62采区的应用 |
| 7. | Based on the rock pressure ' s characteristics of the pre - driven roadway , the rational support plan and parameters about roof bolting with bar and wire mesh are determined , and the manner of driven waste in place of coal was adopted
基于断层中预掘巷的矿压特点，确定出其合理的锚梁网支护方案与支护参数，并采用了掘出的矸石与煤的合理“置换”方式。 |
