Energy-gathered charging device for blasting demolition of thick steel structure workshop and blasting method

The invention provides an energy-gathered charging device for blasting demolition of a thick steel structure workshop and a blasting method. An explosive energy gathering box is arranged in a manner that an opening is upward, a detonator wire passing hole is formed in the explosive energy gathering box, and a detonating detonator is installed at the position of the detonator wire passing hole; an energy gathering box cover extends in the front-back direction, the section perpendicular to the front-back direction is arranged in an arc shape, the convex face of the energy gathering box cover faces the explosive energy gathering box and is installed on the explosive energy gathering box, and the concave face of the energy gathering box cover is used for being opposite to the fracture face of a steel column body; and the strength of the explosive energy gathering box is not lower than the strength of a steel plate of the steel column body of the steel structure workshop, and the thickness of the explosive energy