“基石号”精准贯通西鞍山铁矿5420米通道

Core Viewpoint - The successful completion of the 5420-meter underground transportation tunnel at the Xian Mountain Iron Mine marks a significant milestone in the domestic iron ore industry, showcasing advanced tunneling technology and project management capabilities [1]. Group 1: Project Achievements - The "Foundation Stone" TBM (Tunnel Boring Machine) has successfully reached the endpoint of the auxiliary slope road, completing a key transportation channel for the Xian Mountain Iron Mine [1]. - All eight vertical shafts of the project have been successfully excavated, achieving two-way connectivity [1]. Group 2: Technical Challenges and Solutions - The project faced multiple challenges, including steep gradients, tight radius turns, and hard rock excavation, which were successfully navigated through innovative engineering solutions [1]. - The TBM encountered critical situations, such as getting stuck in soft rock zones, which were resolved through emergency response plans and continuous geological monitoring [2]. Group 3: Technological Advancements - The "Foundation Stone" TBM, measuring 188 meters in length and weighing 1200 tons, has increased excavation speed by over three times compared to traditional methods, achieving a maximum monthly advance of 435 meters while reducing the workforce by over 60% [3]. - The TBM features a high-strength, wear-resistant cutter head capable of handling rock with a uniaxial compressive strength exceeding 200 MPa, and it includes an adaptive steering system for precise navigation in complex underground conditions [3].