Abstract: Firstly, the state of art of the tunnel blasting technology in China is reviewed. It is pointed out that at present the smooth blasting technology and the V-cut technology in China have made certain achievements, but the machinery and tools for tunnel blasting in China lag behind those in the developed countries. Hand-held pneumatic drills are still widely used in the drilling and blasting in tunnel construction in China. Particularly, manual charging, which has low efficiency and safety, is still used in drilling and blasting. There are much work to do in aspects of mechanized blast hole drilling and automatic charging so as to reduce the labor forces and improve the efficiency. Secondly, the recent development of tunnel blasting technology in China is reviewed. It is pointed out that fully-computerized drilling jumbo, improved industrial electronic detonator, and full-face (with invert) blasting method have been successfully applied in the tunnel construction in China, but mechanical charging of mixed or bulk explosives is still in the exploratory stage. Thirdly, on the basis of the analysis on the state-ofart and development of the drilling and blasting technology in China, it is proposed that China′s drilling and blasting technology for tunnels should be deeply integrated with the 5G technology, intelligent drilling and charging equipment should be developed, and the present cut technology and blasting agents should be improved so as to match the development of the drilling equipment and meet the requirements of rapid tunneling rates. Finally, it is concluded that China′s drilling and blasting technology should create favorable conditions for mechanized and intelligent construction of mountain-crossing tunnels via system innovation and technology innovation, and play an important role in leading the drilling and blasting technology for mountain-crossing tunnels in the world.

Key words: mountaincrossing tunnel, drilling and blasting method, rock drilling jumbo, blast hole drilling, charging, mechanization; intelligentization