Abstract: In long tunnel construction process,ventilation cabinet caverns construction is the key. Combined with the construction of ventilation cabinet caverns of Putao Mountain extra-long tunnel caverns,a three-dimensional nonlinear finite element model that based on DP yielding principle was established and stability of ventilation cabinet caverns surrounding rock in the construction was analyzed by ANSYS. For the example of the section where variations of stress,displacement were most significant,effe...