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On May 28, the new Liangfengya Tunnel of the Chongqing-Guizhou Railway was safely completed, marking the first major breakthrough
in the use of new technology for centralized treatment of gas extraction in railway tunnels in China.
It is reported that this is the tunnel
with the highest risk of gas outburst in the history of tunnel construction.
The 344.
4-kilometer-long Yuqian Railway is an important part of the national railway network, known as the "roadblock" of the whole line, the new Liangfengya tunnel has a length of 7618 meters, crossing a long-distance high gas coal seam, which is the tunnel with the highest gas content and the highest risk of gas outburst in the history of tunnel construction in China
.
The deputy general manager of China Railway Construction 18th Bureau Group Tunnel Company, which undertook the construction task, said that the gas content of the coal seam in the Xinliangfengya tunnel exceeded 15 cubic meters per ton on average, and it was easy to produce combustion and explosion if it was not well controlled, and safety risks and construction technical difficulties were rare
in China.
Construction, design, construction and supervision closely cooperate, fully introduce new equipment and technologies such as "gas sudden automatic power off system" and "cave construction personnel positioning system", and build the first batch of high-gas tunnel safety avoidance systems
in China.
The "hydraulic fracturing gas pumping" treatment technology is creatively adopted to effectively control the gas concentration in the tunnel within 8 cubic meters per ton, saving the construction period by more than 100 days compared with traditional technology, ensuring safe and smooth tunnel penetration, and accumulating valuable experience
for the construction and scientific research of high gas tunnels under special geological conditions in China.
The safe breakthrough of the new Liangfengya Tunnel marks a major achievement in the construction of the Chongqing-Qianqian Railway, creating favorable conditions
for the completion and operation of the entire line next year.
After the completion and opening of the Chongqing-Qianqian railway at the end of next year, the travel time between Chongqing and Guiyang will be shortened from the current 9 hours to 2 hours
.
On May 28, the new Liangfengya Tunnel of the Chongqing-Guizhou Railway was safely completed, marking the first major breakthrough
in the use of new technology for centralized treatment of gas extraction in railway tunnels in China.
It is reported that this is the tunnel
with the highest risk of gas outburst in the history of tunnel construction.
The 344.
4-kilometer-long Yuqian Railway is an important part of the national railway network, known as the "roadblock" of the whole line, the new Liangfengya tunnel has a length of 7618 meters, crossing a long-distance high gas coal seam, which is the tunnel with the highest gas content and the highest risk of gas outburst in the history of tunnel construction in China
.
The deputy general manager of China Railway Construction 18th Bureau Group Tunnel Company, which undertook the construction task, said that the gas content of the coal seam in the Xinliangfengya tunnel exceeded 15 cubic meters per ton on average, and it was easy to produce combustion and explosion if it was not well controlled, and safety risks and construction technical difficulties were rare
in China.
Construction, design, construction and supervision closely cooperate, fully introduce new equipment and technologies such as "gas sudden automatic power off system" and "cave construction personnel positioning system", and build the first batch of high-gas tunnel safety avoidance systems
in China.
The "hydraulic fracturing gas pumping" treatment technology is creatively adopted to effectively control the gas concentration in the tunnel within 8 cubic meters per ton, saving the construction period by more than 100 days compared with traditional technology, ensuring safe and smooth tunnel penetration, and accumulating valuable experience
for the construction and scientific research of high gas tunnels under special geological conditions in China.
The safe breakthrough of the new Liangfengya Tunnel marks a major achievement in the construction of the Chongqing-Qianqian Railway, creating favorable conditions
for the completion and operation of the entire line next year.
After the completion and opening of the Chongqing-Qianqian railway at the end of next year, the travel time between Chongqing and Guiyang will be shortened from the current 9 hours to 2 hours
.
