中国安全科学学报 ›› 2026, Vol. 36 ›› Issue (4): 85-93.doi: 10.16265/j.cnki.issn1003-3033.2026.04.0133

• 安全技术与工程 • 上一篇    下一篇

非稳定含煤地层隧道施工中瓦斯异常涌出防控技术

王立川1(), 肖红武2, 安丰华3,4,**(), 刘延龙2, 王兆丰4, 周宗青5   

  1. 1 中铁十八局集团有限公司, 天津 300222
    2 中铁二十三局集团有限公司, 四川 成都 610072
    3 中国矿业大学 力学与土木工程学院, 江苏 徐州 221116
    4 河南理工大学 安全科学与工程学院, 河南 焦作 454003
    5 山东大学 齐鲁交通学院, 山东 济南 250002
  • 收稿日期:2025-11-14 修回日期:2026-02-05 出版日期:2026-04-28
  • 通信作者:
    **安丰华(1984—),男,山东临沂人,博士,副教授,主要从事工程管理、矿山灾害防治方面的研究。E-mail:
  • 作者简介:

    王立川 (1965—),男,河南孟州人,博士,正高级工程师,主要从事隧道与地下工程的建设技术、缺陷与病害成因分析和整治技术、爆破振动与冲击波传播规律等方面的工作。E-mail:

    肖红武, 正高级工程师

    刘延龙, 正高级工程师

    王兆丰, 教授

    周宗青, 教授

  • 基金资助:
    国家重点研发计划(2022YFB2302403-05); 国家自然科学基金资助(52474266); 国家自然科学基金资助(52174172); 中铁二十三局集团有限公司科技研发计划(2019-10C)

Prevention and control technologies for abnormal gas emission in tunnel construction through unstable coal-bearing strata

Wang Lichuan1(), Xiao Hongwu2, An Fenghua3,4,**(), Liu Yanlong2, Wang Zhaofeng4, Zhou Zongqing5   

  1. 1 China Railway 18th Bureau Group Co., Ltd., Tianjin 300222, China
    2 China Railway 23rd Bureau Group Co., Ltd., Chengdu Sichuan 610072, China
    3 School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou Jiangsu 221116, China
    4 School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China
    5 School of Qilu Transportation, Shandong University, Ji'nan Shandong 250002, China
  • Received:2025-11-14 Revised:2026-02-05 Published:2026-04-28

摘要:

为治理非稳定含煤地层条件下隧道瓦斯异常涌出风险,以成昆铁路扩改项目保安营1号隧道1号斜井工区为对象,通过现场测试、数值模拟和工程试验相结合的方法,研究瓦斯涌出特征、异常涌出风险判识方法及防控技术。结果表明:隧道瓦斯源于洞身穿过地层中的不稳定煤层、碳质岩,围岩含煤、含碳情况及地质体破碎程度与瓦斯涌出息息相关;可采用物探+钻探综合测试方法,以不良地质体、岩性变化、钻孔瓦斯体积分数及涌出量作为多元辨识指标,确立瓦斯异常涌出超前判识方法;针对非稳定赋存瓦斯异常涌出风险,提出“钻墙”高效截流防治技术,在隧道两侧钻场内施工围绕掘进隧道的“钻墙”钻孔,抽截煤岩瓦斯。现场应用结果证明:此方法有助于减少施工干扰,提高进尺速度。

关键词: 非稳定含煤地层, 隧道施工, 瓦斯异常涌出, 防控技术, 超前判识方法, 截流抽采

Abstract:

To prevent the risk of abnormal gas emissions during tunnel excavation through unstable coal-bearing strata, this study focused on the inclined shaft section of Baoanying No.1 Tunnel in the Chengdu-Kunming Railway Expansion Project. Through on-site monitoring, numerical simulation, and engineering application, gas emission patterns, risk identification methods, and prevention technologies were investigated. The results indicate that tunnel gas originates from unstable coal seams and carbonaceous rocks within the strata, and gas emissions correlate strongly with coal/carbon content in surrounding rocks and the degree of geological fracturing. Then an integrated geophysical-geological drilling approach was employed to establish an advanced identification method for abnormal gas emissions. This method utilizes multiple indicators: unfavorable geological bodies, lithological variations, borehole gas concentrations, and emission rates. A "borehole curtain" interception technique was developed for high-efficiency gas risk prevention and control. Boreholes arranged in curtain patterns were drilled from both side chambers to intercept and extract coal-rock gas ahead of the advancing tunnel face. Field applications demonstrate that this technology reduces construction interference and increases advance rates.

Key words: unstable coal-bearing strata, tunnel construction, abnormal gas emission, control technology, advanced identification method, interception and drainage

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