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-ofart 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.
FANG Junbo
,
LIU Hongzhen
,
ZHAI Jinying
. Development and Prospect of Blasting Technology for Mountain-Crossing Tunnels[J]. Tunnel Construction, 2021
, 41(11)
: 1980
-1991
.
DOI: 10.3973/j.issn.2096-4498.2021.11.012
