Demolishing methods of directional collapsing chemney and water tower aredescribed, the manul demolishing, mechnical demolishing and blast demolishing methods and their specifications are presented.

• 结合工程实例，对砖砌烟囱在定向爆破中易出现的“后坐”现象进行了分析，并对防止“后坐”提出了比较有效的解决办法。