两层内衬烟囱的控制爆破拆除

位于市区３０多米高的孤立山包上，一座有两层内衬的５３m高的砖烟囱，其中最上部有３m已出现破裂偏斜，应用烟囱定向倾倒控制爆破技术，设计迁取的合理的倾倒方向，并对最里层保温层和内衬进行了预拆除，采取了开设定向窗、烟囱外壁和中间内衬同网起爆的技术方案，共用５８发瞬归电雷管，总装２号岩石硝铵炸药２４７５g，一次起爆成功。

Controlled Blasting of a Chimney with Two Layers Lining

A 53m high chimney with two layers of lining,situated on a hill in the city, is slanting due to its rupture at the upper end. A dierctional controlled blasting was used to demolish the chimney through reasonably selecting the collapse direction and pre demolishing the insulating layer and lining, the technological programs of opening a directional window and blasting the wall and lining at once are adopted.