Recently, the "Kiln Coal Pioneer" TBM, which was independently developed and applied to Haishiwan Coal Mine by China Railway Construction Heavy Industry, successfully completed the spiral downhill excavation with small turns and large inclinations. As the first TBM hard rock TBM introduced by a coal enterprise in Gansu Province, and also the first coal mine TBM in China to complete the construction of R50m small turn and 14° downhill rectangular spiral, the "Kiln Coal Pioneer" will have good news in the first month of 2024 and successfully break through the kilometer mark.
"Kiln Coal Pioneer" small turn, large inclination spiral downhill tunneling.
"Kiln Coal Development TBM" is used in the development project of the third mining area of Haishiwan Coal Mine, and the project is arranged in the bottom plate of the second layer of coal, with a total length of about 54 km. At the beginning of the project, the machine encountered the challenge of rectangular spiral boring with a 14-degree downhill slope and a 50-meter radius. In view of the industry problems encountered in the construction process, such as "small turns, large downhills, and many fault fracture zones". For the first time, the "Kiln Coal Pioneer" adopts the U-shaped shield structure design with ultra-small empty top distance, which takes into account the safety of the shield-type TBM host and meets the requirements of small turns, and also has the advantages of open TBM small empty top distance, which can adapt to the requirements of timely support. In view of the blind area of the top support of the shield, the R&D technical team of China Railway Construction Heavy Industry Co., Ltd. has developed a U-shaped shield structure equipped with a front-mounted anchor net support system, which shortens the distance between the empty roof from 8 meters to 4 meters, realizes the forward movement of the support, and effectively reduces the construction risk. 
"Kiln Coal Pioneer" TBM rolled off the production line.
"Kiln Coal Pioneer" TBM successfully completed the small turn and large inclination angle rectangular spiral downhill excavation, which fully demonstrated the advantages of TBM roadheader in hard rock roadway construction, and also made the technical advancement and product reliability of TBM products of China Railway Construction Heavy Industry Co., Ltd. have been strongly verified again. China Railway Construction Heavy Industry Co., Ltd. unswervingly adheres to the customized policy of customer-centric and "one mine, one policy", provides "nanny-style" services during TBM tunneling, quickly solves equipment problems, ensures the operation of equipment throughout the process, and writes a new chapter of cooperation and development with coal mine customers. 
Zhuozhong construction machinery media organization
Statement: The copyright of all articles, audio, files and other materials belongs to the copyright owner, and the content of the non-original articles and other materials used by this website cannot be contacted by the copyright owner one by one, if the author and editor of the article of the selected content of this *** believe that its works are not suitable for readers to browse, or should not be used free of charge (involving cost issues, it is necessary to delete "not suitable for everyone to browse the Internet, or should not be used for free") Please notify us by email or ** in a timely manner, In order to take appropriate measures quickly to avoid unnecessary economic losses to both parties.