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References

JIAZHUQING Tunnel
JIAZHUQING Tunnel
JIAZHUQING Tunnel is the first tunnel with potential dangers of coal and gas outburst in the history of Chinese railway tunnel construction. It started in 1993, completely finished and opened to traffic in May 11th, 1996.

The tunnel is located in Wei-Hong section of Nanning-Kunming Railway, and ONTON self drilling anchors had been used in large numbers.
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