Study on the Causes and Treatment Measures of Gas Outburst in Carbonaceous Mudstone Tunnel
In order to solve the problem of gas outburst in carbonized mudstone stratum tunnel,the dynamic phenomenon and characteristics of gas outburst in the tunnel are summarized,the law and influencing factors of gas outburst are analyzed,and the pressure relief scheme and treatment measures are put forward through field investigation and theoretical analysis,based on Tongzi tunnel,expansion project of Chongqing-Zunyi section of National Expressway from Lanzhou to Haikou(Guizhou province).The results show that after treatment,the dynamic phenomenon of the coal mudstone construction face is obviously reduced and weakened,and the engineering construction is basically not affected,indicating that the effect of the treatment measures is good.The research results can be used as a reference for the design and construction of gas tunnels in the coal mudstone stratum and other non-coal strata.
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