川西高原非煤系地层隧道瓦斯涌出模式与瓦斯逸散规律  

EMISSION MODES AND RUNAWAY CHARACTERISTICS OF GAS IN NON-COAL STRATA TUNNEL IN WESTERN SICHUAN PLATEAU

作　　者：牟力 邓昌中 谭书平 张文居 刘宏 徐岗 MOU Li;DENG Chang-zhong;TAN Shu-ping;ZHANG Wen-ju;LIU Hong;XU Gang(Sichuan Tibetan Area Expressway Co.,LTD.,Chengdu 610041,China;Sichuan Jiuma Expressway Co.,LTD.,Chengdu 610213,China)

机构地区：[1]四川藏区高速公路有限责任公司,成都610041 [2]四川久马高速公路有限责任公司,成都610213

出　　处：《地质灾害与环境保护》2024年第3期68-74,共7页Journal of Geological Hazards and Environment Preservation

摘　　要：国家基础设施建设进入新一轮快速发展阶段,川西隧道建设也呈现出密集发展态势,在隧道建设过程中,瓦斯涌突灾害频发,造成了巨大的经济损失和重大的人员伤亡。本文依托川西高原汶马高速和久马高速的所有瓦斯隧道,通过资料收集、现场调查以及数值分析,概况了非煤系地层瓦斯隧道灾害的3种涌出模式:(1)生烃岩层直接揭露型;(2)深埋气藏导气构造连通型;(3)气源构造间接揭露型。针对导气构造型瓦斯隧道,发现断层与掌子面斜交时,容易发生瓦斯局部富集的现象,揭示了不同类型断层等导气构造对浅埋隧道瓦斯逸散规律的影响。The national infrastructure construction has entered a new stage of rapid development, and the construction of the West Sichuan Tunnel has also shown a dense development trend. During the tunnel construction process, gas outburst disasters occur frequently, causing huge economic losses and significant casualties. This article relies on all the gas tunnels of the Wenma Expressway and the Jiuma Expressway that have been built in the western Sichuan Plateau. Through data collection, on-site investigation, and numerical analysis, three types of gas emission mode of gas tunnel disasters in non-coal bearing strata are summarized:(1) direct exposure type of hydrocarbon generating strata;(2) Deep buried gas reservoirs with connected gas conducting structures;(3) The indirect exposure type of gas source structure reveals. For gas conducting structural gas tunnels, it is found that when faults intersect with the face of the tunnel, local gas enrichment is prone to occur, this reveals the influence of different types of gas conducting structures such as faults on the gas escape law of shallow buried tunnels.

关 键 词：瓦斯涌突 瓦斯隧道 非煤系地层 瓦斯逸散 涌出模式 

分 类 号：P642[天文地球—工程地质学] U459.2[天文地球—地质矿产勘探]