Detonating fuse will be used to detonate with interval charging for tunnel smooth blasting traditionally, it is more difficult to use detonator to detonate and propagate.

• 对于隧峒开挖光面爆破,如果采用孔内间隔装药,按传统方法须采用导爆索引爆,用雷管引爆,传爆是件较困难的事情。