Recently，China Railway Construction Heavy Industry Co., Ltd. is the first mining inclined shaft open type in ChinaTBM“Endeavor”Helps the excavation and construction of the main inclined shaft of Kekegai Coal Mine to be completed，Complete all excavation tasks of 5330 meters of the project section in 10 months，The construction period of 53 months of the traditional well construction method is shortened by 36 months.，And created the domestic coal mine open type.TBMMaximum diameter of excavation、Coal mine inclined shaft construction mileage is the longest、Fastest monthly footage and other construction records。

The first open type mine inclined shaft in ChinaTBM“Endeavor”

At the same time，Relying on the project“Key Technology and Equipment of Intellectualized Construction of Mine Super Long Inclined Shaft TBM”The results of scientific research projects have also passed the acceptance test smoothly.，China Coal Industry Association、The unanimous approval of China Coal Society，The overall research results have reached the international leading level.。

It is the first time to adopt open type in China.TBMConstruction of coal mine inclined shaft project，The maximum buried depth of the project is over 500 meters.，Slope 5.Six degrees，The auxiliary inclined shaft reaches 6 degrees.，And that vertical curve small tur tunneling is require to be frequently performed.，There is no precedent in the industry to follow.。

Device origination

Throughout the design process，China Railway Construction Heavy Industry Co., Ltd. and Cocoa Cover Owner、China Coal Third Construction Group、China Railway 15th Bureau Group actively communicates，Fully understand the site requirements，Weak surrounding rock in the coal mine area proposed by the customer、Mudstone paste cutterhead、Inclined shaft reverse slope drainage、The amount of support is large、Targeted design for construction problems such as synchronous laying of inverted arch，Combine years of shield machine/TBMManufacturing experience，Make every effort to build intelligent equipment，It provides an effective guarantee for the safe and efficient tunneling of the project.。

Excellent equipment performance、Efficient and high-quality service makes Tiejian Heavy Industry highly recognized by customers.。The equipment set many industry records during the construction process.：Coal mine maximum diameter open typeTBM（7.13 meters）、Maximum shift footage 20.98 meters、Maximum daily footage 40.5 meters、Maximum monthly footage 812.6 meters、Average monthly footage 509.7 meters、More than 500 meters of footage for four consecutive months。  

During tunneling of equipment

In addition，Auxiliary inclined shaft of Kekegai Coal Mine designed and manufactured by China Railway Construction Heavy Industries Co., Ltd.TBMAlso created 521.Monthly footage record of 53m，By the end of 2022, the excavation task of the bid section was completed.，It marks that the railway construction heavy industry is designed and manufactured for the main and auxiliary inclined shaft project of Kekegai.TBMAchieve overall success，It fills the gap in the field of long-distance inclined shaft construction in China.。