Secondary static blasting device

The secondary static blasting device comprises a middle column, a containing box, a chassis, plugging mechanisms, stiffening plates, splitting knife mechanisms and heating wires, the containing box is installed on the upper portion of the chassis, the middle column is inserted in the center of the containing box and penetrates through the lower portion of the chassis, and the multiple plugging mechanisms are arranged on the circumferential portion of the chassis; a stiffening plate is arranged at the lower end of the base plate, the splitting knife mechanism is arranged on the lower portion of the middle column in a sleeved mode, a middle column inner bag is arranged in the middle column, and a heating wire is embedded in the middle column inner bag. The device has the beneficial effects that the blade-shaped splitting mechanism is arranged, multi-directional fragmentation of rocks is facilitated, the expanding agent injection function is fused, the construction efficiency is improved, and the construction pr