【摘要】 通过三座砖砌高耸烟囱的定向爆破拆除工程，介绍了爆破工程设计的基本原理和程序、参数选取与爆破效果，并且对烟囱倾倒规律和对倾倒方向有影响的因素作了分析。更多还原

【Abstract】 Through the demolition projects of directional blasting for three tower-ing brick chimneys,the basic principle and procedure,the parameter selection and blasting ef- fect are introduced. The rules of collapse and fall of chimney and factors which influence thecollapse and fall direction are also analyzed.更多还原