Abstract: Numerical simulation analysis on refuge chamber antiknock performance provides the modified basis for the design of the rescue capsule and numerical detection. The various components of rescue capsule are mostly welded connections, and different processing approachs directly affect the calculation results. Based on the finite element software LS-DYNA, the dynamic response of a rescue capsule under blasting are simulated by numerical method, and the welding position uses the ruled (shell elements) connection and solid elements point-to-point docking mode. The results show that the cabin maximum displacement S_max diminished exponentially with the thickness of ruled elements, through comparing maximum deformation results in solid elements skin and shell element skin, the two results are more consistent when the thickness of ruled elements is 3 ~ 5 mm.