Design and Application of Explosion-proof System for Non-coal Tunnel Metro Shield Based on ATEX Standard
ZHANG Lixun
CUI Liwei
GAO Bo
LIN Fulong
Abstract：To address the explosion prevention issues of metro shield and belt conveyors in non-coal gas tunnel construction in Europe,an economical and reliable metro shield method explosion-proof solution was proposed.We have studied the EU ATEX standard and the Italian NIR44 explosion-proof standard,and carried out corresponding explosion-proof designs according to different explosion-proof areas.The design of explosion-proof positive pressure cabinets,belt conveyors,and conveyor protective covers was completed.The method of real-time dynamic adjustment of the explosion-proof area during excavation was adopted,and the positive pressure explosion-proof cabinet was modified and optimized,making the entire explosion-proof system safe,reliable,and cost-effective.The explosion-proof system has been successfully applied to non-coal gas tunnel projects in Italy.
Keywords：metro shieldexplosion-proofATEXNIR44positive pressure cabinetbelt conveyor
Publication Date：2025-08-30
Online Publishing Date：2025-09-23(First online date of this platform, not the publication date of the document)
Pages：4( 81-84 )