复杂环境下120m高烟囱定向爆破拆除

常州市第一热电厂内需要爆破拆除的一座高120 m的烟囱，其周边存在有热气管道、厂房、通信发射塔、高压线等，爆破区域范围内环境复杂、距离保护目标较近，使得塌落振动及爆破飞石控制困难等。结合烟囱结构特性及现场实际，通过提高爆破切口标高，选择合理的设计方案及参数，采取减震沟、减震土堤、堵截墙等多项针对性安全防护措施，取得了良好的爆破效果。

Directional Blasting Demolition of a 120m Chimney in Complex Environment

The design and construction of directional blasting demolition of a 120m high chimney in Changzhou is introduced, where existing hot gas pipeline, workshop, communication tower and high voltage line and so on. The environment of blasting area is complex and near to the protection objects, it is difficult to control the collapse vibration and flyrocks. According to the features of chimney structure and the site actual situation, good blasting results are achieved by rising the blasting cut height, selecting reasonable design scheme and parameters and adopting pertinence safety precautions measures of damping ditch, damping earth embankment and cut-off wall.