The TBM often jammed due to the overlarge thrusting force and torque induced by collapse of working face and overlarge mucking during TBM boring in waterrich and silty sand stratum. The ground ahead of cutter head is grouting consolidated, so as to successfully disassembling the jammed TBM. The watercontaining rate of the ground is reduced, the stability of the ground is improved and the successful and safe disassembling of cutter head is guaranteed.