The Guinea Kindia Tunnel project undertaken by China Railway 18th Bureau Group utilizes Yier Technology.AT-4000LThe Raise borer Machine successfully broke through.Diameter1# ventilation shaft with a diameter of 3.5 meters and a depth of 213.5 meters.The tunnel construction has achieved a phased victory. The Kindia Tunnel project is located on the border between Guinea and Sierra Leone, in a remote geographical location with extremely poor transportation conditions. After experiencing difficulties in the early stage of drilling rig entry, poor construction conditions, and communication challenges, Yier Technology's after-sales engineer Zhang Jun ensured the quality of the shaft and improved construction progress, demonstrating the company's excellent professional level and dedication.Clientpraise and recognition.

The success of the project relies on everyone's sincere cooperation.To ensure the inclination rate of the tunnel ventilation shaft,the engineering department of China Railway Construction, the design institute, and Yier Technology jointly discussed the construction plan for the shaft and slope protection measures. The surface foundation uses a platform to level the shaft entrance, and the drilling platform's steel frame is positioned.The original design height of the lock ring was raised from2 meters to 6 meters, and the ring was made into a solid cylindrical shape, with the middle hollow filled with concrete to ensure that the Raise borer Machine does not deviate during construction.

During the guiding hole process, the advantages of Yier Technology's Raise borer Machine technology were fully utilized, equipped with automatic anti-jamming and deep well anti-deviation systems, allowing precise control of the guiding hole deviation in extremely complex strata.

After installing the reaming cutter head, after-sales engineer Zhang Jun, with rich experience in mechanical rock breaking, strictly controlled the rock breaking parameters, constantly monitored the debris situation, and ensured that the cutter head operated smoothly, orderly, and safely; after the reaming was completed, members of the China Railway Guinea project department came to observe and congratulate, and the construction quality met the design requirements well, receiving recognition from all parties.

(Project docking group)

(Reaming completed·Machine relocation)

(Receiving cutter head)(Smooth well wall·Good ventilation effect)

In addition to the hard work during the construction process, Yier Technology also places great importance on after-sales service. A complete after-sales service system has been established.A spare parts warehouse has been established locally,which includes but is not limited to wear parts, seals, consumables, structural parts, motors, pumps, and other key components, providing sufficient material supply to ensure that there are enough spare parts available for equipment maintenance or unexpected failures.An online working group has been established,to address on-site technical difficulties and various after-sales needs, the technical team and after-sales team of the Yier Technology project group promptly assess and analyze, striving to ensure that every issue is properly resolved. The successful breakthrough of the Kindia Tunnel ventilation shaft is another strong proof of Yier Technology'sAT-4000L Raise borer Machine capabilities. At the same time, we also look forward to the early completion of the Kindia Tunnel project, injecting new vitality into Guinea's development.