(1)预告信号:间断鸣三次长声,即鸣30s、停、鸣30s、停、鸣30s;此时现场停止作业,人员迅速撤离
(2)准备信号:在预告信号20min后发布,间断鸣一长、一短三次,即鸣20s、鸣10s、停、鸣20s、鸣10s、停、鸣20s、鸣10s。
(3)起爆信号:准备信号10min后发出,连续三短声,即鸣10s、停、鸣10s、停、鸣10s
(4)解除信号:一次长声,鸣60s。
(1)预告信号:间断鸣三次长声,即鸣30s、停、鸣30s、停、鸣30s;此时现场停止作业,人员迅速撤离
(2)准备信号:在预告信号20min后发布,间断鸣一长、一短三次,即鸣20s、鸣10s、停、鸣20s、鸣10s、停、鸣20s、鸣10s。
(3)起爆信号:准备信号10min后发出,连续三短声,即鸣10s、停、鸣10s、停、鸣10s
(4)解除信号:一次长声,鸣60s。