Rock bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Rock bolt reinforcement can be used in any excavation geometry, is simple and quick to apply, and is relatively inexpensive. The installation can be fully mechanized. The length of the bolts and their spacing can be varied, depending on the reinforcement requirements. There are three major ways of anchoring the r…
- High Srength Rock Bolt/ Anchor Bolt: is an advanced rock bolt which can Ensure anchoring effect for complex ground conditions ranging from sand and gravel to inconsistent fill, boulders, rubble and weather rock.
- Application: tunneling, mining, slope stabilization and foundation support
- Standard: MT 145.2; YB/T 4363; GB/T 20065; Or as clients’ request
| Steel Grade | Yield Strength | Tensile Strength | Elongation After Fracture | Elongation under Max Force | Impact Absorb Energy | |
| Rel/MPa | Rm/MPa | A/% | Agt/% | kv2/J | ||
| NOT LESS THAN | ||||||
| Industrial Standard | MG335/MG400 | 335 | 500 | 15 | 40 | |
| MG500 | 500 | 700 | 22 | 100 | ||
| Our company Standard | 600 | 600 | 750 | 19 | 9 | 90 |
| 700 | 700 | 850 | 17 | 7.5 | 80 | |
| 785 | 785 | 930 | 16 | 5.5 | 60 | |
| 830 | 830 | 1030 | 15 | 4.5 | 50 | |
