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China Railway 25th Bureau 3-meter diameter tunnel ventilation shaft construction
2025-04-16
| Project Location |
Guangdong, China Railway 25th Bureau, Jieyang |
| Date |
2022.04-2022.06 |
| Model |
R120D |
| Well Depth |
203 meters |
| Diameter |
3 meters |
| Rock Hardness |
F14-16 |
| Operation Time |
Pilot hole, reaming 66 days |
Construction Drilling Ceremony
3-meter diameter cutter head reaming, penetration, lifting and out of well
Pilot hole penetration deviation 200mm
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