Safe construction technology of TBM for hard rock excavation under complex geological conditions
YANG Feng
Abstract：The Pingdingshan Coal Mine is facing a prominent problem of tight coal mining and excava-tion succession.The TBM(Tunnel Boring Machine)excavator,with its efficient,safe and mechanized features,has become a powerful tool for rock tunnel excavation in coal mines.This paper studies the"Pingmei Shield No.1"EQC5530 full-section hard rock excavator,elaborates on the advan-tages of the full-section open-type shield machine in rapid tunneling in coal mine rock tunnels,and combines its application situation in the third row of gangue conveyor of Pingmei the 13th Mine,mainly analyzing and summarizing from aspects such as TBM equipment design and key components,TBM rapid support during excavation,TBM transportation system guarantee technology,and long-distance ventilation and cooling technology.The results show that the TBM equipment design meets the requirements for safe and rapid long-distance large-section complex geological tunneling;by opti-mizing the support design,the downtime caused by imbalance between excavation and support is re-duced;the existing transportation of materials and gangue conveying system is renovated to achieve the balance of excavation and transportation;the original ventilation system is renovated to achieve long-distance ventilation and cooling.The maximum single-shift advance is 10.8 m,the maximum sin-gle-day advance is 26 m,and the maximum monthly advance is 314.5 m,providing valuable experience and technical references for TBM tunneling in similar mines.
Keywords：long-span distancemassive cross-sectioncomplicated geological conditionsdeep-seated rock roadwayTBMhigh-speed tunneling advancement
Publication Date：2025-10-01
Online Publishing Date：2025-09-22(First online date of this platform, not the publication date of the document)
Pages：7( 34-40 )