两层内衬烟囱的控制爆破拆除

Controlled Blasting of a Chimney with Two Layers Lining

位于市区 30多米高的孤立山包上 ,一座有两层内衬的 5 3m高的砖烟囱 ,其最上部有 3m已出现破裂偏斜。应用烟囱定向倾倒控制爆破技术 ,设计选取了合理的倾倒方向 ,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 5 8发瞬发电雷管 ,总装 2号岩石硝铵炸药 2 475 g ,一次起爆成功。

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.