川中地区隧道浅层天然气超前地质预报技术  

Advanced Geological Prediction Technology for Shallow Natural Gas in Tunnels Located in the Central Sichuan Region

作　　者：魏山栋 宋伟 倪浩峰 杨鸿程 WEI Shandong;SONG Wei;NI Haofeng;YANG Hongcheng(Sichuan Chengn an Expressway Co.,Ltd.,Chengdu,Sichuan 610051,China;Sichuan Jintong Engineering Test and Inspection Co.,Ltd.,Chengdu,Sichuan 610095,China)

机构地区：[1]四川成南高速公路有限责任公司,四川成都610051 [2]四川金通工程试验检测有限公司,四川成都610095

出　　处：《黑龙江交通科技》2025年第4期115-118,125,共5页Communications Science and Technology Heilongjiang

摘　　要：四川盆地有着广泛的天然气分布,除二叠系、三叠系等直接生烃地层外,天然气还会通过断层、节理裂隙等地质构造运移至浅部地层。当隧道建设过程遇到浅层天然气时,有可能引发瓦斯突出、爆炸、拱顶或侧壁失稳等安全事故,会给隧道建设和人民生命财产带来巨大损失。为有效减少和避免浅层气囊在隧道建设过程中引起的灾害,需要寻找一种有效的超前地质预报技术事先探测出浅层天然气储存位置,从而为提前处置提供可靠依据,以预防灾害发生。通过分析川中地区浅层天然气的储存特征和各种超前地质预报方法的特点,提出以隧道超前地震地震波反射法、地质雷达法和超前地质钻探法相结合的浅层天然气综合超前地质预报技术,在成南高速扩容工程永立隧道中进行现场试验,并分析其探测效果,为浅层天然气超前地质预报方法选择提供参考资料。The Sichuan Basin has a wide distribution of natural gas.In addition to direct hydrocarbon generating formations such as the Permian and Triassic,natural gas can also be transported to shallow formations through geological structures such as faults and joints.When shallow natural gas is encountered during tunnel construction,it may cause safety accidents such as gas outbursts,explosions,unstable arches or sidewalls,which can cause huge losses to tunnel construction and people’s lives and property.In order to effectively reduce and avoid disasters caused by shallow airbags during tunnel construction,it is necessary to find an effective advanced geological prediction technology to detect the storage location of shallow natural gas in advance,so as to provide reliable basis for early disposal and prevent disasters from occurring.By analyzing the storage characteristics of shallow natural gas in the central Sichuan region and the characteristics of various advanced geological prediction methods,a comprehensive advanced geological prediction technology for shallow natural gas is proposed,which combines Tunel Seismic Prediction seismic wave reflection method,geological radar method,and advanced geological drilling method.Experiments are conducted in the Yongli Tunnel of the Chengdu-Nanchorg Expressway expansion project to analyze its detection effect,provide reference materials for the selection of advanced geological prediction methods for shallow natural gas.

关 键 词：公路隧道 浅层天然气 超前地质预报 隧道超前地震 地质雷达 超前地质钻探 

分 类 号：U456[建筑科学—桥梁与隧道工程]