According to the advantages of high tensile resistance and high shear strength of composite steel plate, a new antiexplosion\nprotection method of composite steel plate lining structure is put forward. The numerical model of explosion impact of subway\ntunnel with composite steel plate lining structure was established by dynamic analysis software. The transient dynamic response of\nlining structure with the composite steel plate was simulated when explosion occurred. The research results show that the\ninfluence of explosive quantity on each point of composite steel plate lining structure is different and the change of acceleration\nnear the centre of the detonation source is generally greater than the multiple of the increase of explosive quantity. The increase of\nvelocity and displacement is basically consistent with the quantity of explosive. The influence of axial stress on the lining structure\nis the least, and the influence of the lining structure is greater in the y-direction than in the x-direction. The research results can\nprovide the plan and basis for the emergency response of the subway tunnel.
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