地下六百多米挖车间

Core Insights - The "Foundation Stone" TBM has completed 5,400 meters of auxiliary slope tunnel excavation and is set for disassembly and reassembly, which is crucial for the project's progress [1][2] - The West Yanshan Iron Mine is the largest single underground iron mine under construction in China, with a total investment of 22.9 billion [2] Group 1 - The disassembly of the "Foundation Stone," which weighs approximately 1,200 tons, requires the expansion of the existing 7-meter-wide tunnel to 12 meters to accommodate the process [1] - The dedicated disassembly workshop is over 30 meters long and 16 meters high, comparable to a five-story building, and will be equipped with a gantry crane for handling large components [1][2] Group 2 - The project faces significant challenges, particularly with smooth blasting in a workshop that has uneven rock walls, necessitating precise calculations for drilling and monitoring during blasting to ensure worker safety [2] - Since the project's commencement in 2022, the engineering team has been working continuously, even during the Spring Festival, to maintain progress [2]