The total blasting charge was large when simultaneous blasting of multiple blasting areas in underground mines, it was difficult to set up blasting network,and the network was more complex after setting up blasting network,especially when the blasting area was far from each other.The compound detonating network of detonating cord and detonating nonel tube has the advantages of large detonating power,fast detonation transmission speed,long detonation distance,simple network structure and reliable connection,which can effectively solve the problem of blasting network formation when multiple remote blasting areas are simultaneously detonated.Three blasting areas in two sections of a mine need to be detonated at the same time,and the amount of blasting ore is 61,000 tons.The compound detonating network of detonating cord and detonating tube was adopted,and 1278 detonating tubes were successfully detonated with 120 m long transmission detonating cord,and the amount of blasting charge was 20.3 t.Through the analysis of blasting vibration,safe explosion distance and blasting fragmentation,it is considered that the blasting effect is good.Through practice,the detonating network of detonating cord-detonating nonel tube has strong networking ability,reliable network connection,clear and intuitive,easy to check the connection quality,and reduces the cost of blasting,which can provide reference for engineering blasting of similar mines.