《Table 2 Risk impacts of different types of disasters.》

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《川藏铁路工程建设安全面临的挑战与对策》

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There are also many tunnels in the Sichuan–Tibet Railway:Some are super-long and super-deep，some are located in highgeostress areas，fractured zones，or extremely high geotemperature areas.According to previous experience with railway constructions [1–4]，the probability of accidents in tunnel construction is the highest，including collapse，mud burst，and water burst.Therefore，the prevention of these disasters must be focused on.