大断面瓦斯隧道钻爆开挖施工技术

On drill-blast tunneling technique of large-section gas tunnels

针对新建简蒲高速大断面低瓦斯的二峨山隧道钻爆开挖施工难题,通过现场勘探及理论分析,论述了瓦斯涌出的可能性,并从爆破参数、安全验算及施工工艺等方面,提出了合理的爆破方案及参数,确保了瓦斯隧道钻爆开挖工程的质量及安全,达到了良好的爆破施工效果。

According to the construction difficulties of the drill-blast tunneling at the large-section low-gas Er＇eshan Tunnel along Jianyang-Pujiang Expressway,the paper indicates the feasibility for the gas emission from the site survey and theoretic analysis,points out the reasonable blasting scheme and parameter from the blasting parameter,safety calculation,and construction craft,and ensures the quality and safety of the drill-blast tunneling of the gas tunnels,so as to achieve better blasting effect.