Recently，Kim TaeSX50/SX50SDouble-wheel milling is carried out simultaneously at Qijiang Xincheng Station of Nanzhong Intercity Railway，Fast construction efficiency，The rock breaking ability is strong enough for the project to take two.“Reassurance pill”。The construction depth of the project is 32~38m，Slot width 1~1.2m。Considering the tight schedule and heavy task of the project, 32mTo 38mGeological characteristics of completely weathered granite，Formation hardness exceeds 100 MPa；It is necessary to lead the hole by rotary excavation.，Auxiliary construction of grab bucket；At present, Kim TaeSXThe construction efficiency of a series of double-wheel milling machines is less than 24 hours, and a wall may be completed.，Up to now, 45 walls have been completed，A total of 100。