Blasting demolition method for sleeve-type chimney

Abstract

Disclosed in the present invention is a blasting demolition method for a sleeve-type chimney, which relates to the technical field of demolition and blasting. When cuts are formed, second cut areas are arranged on a cylinder wall of an inner cylinder, and at the same height, circumferential positions of the second cut areas on the inner cylinder correspond to circumferential positions of first cut areas on an outer cylinder. During detonation, the first cut areas and the second cut areas at the same height will be detonated synchronously, which causes the inner cylinder and the outer cylinder to lose stability simultaneously and collapse together in the same direction. This solves the problem that the inner cylinder remains upright or partially remains after the directional collapse of the outer cylinder, thereby reducing the construction cost, shortening a construction period, and lowering the safety risk of high-altitude operations.