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在地下空间开发过程中,浅层沼气作为一种工程地质灾害,影响着隧道施工安全和质量。首先介绍了沼气的成因、赋存特点。然后阐述了隧道施工中浅层沼气的危害形式及其内在机理。最后结合浅层沼气地层自身工程特点,引入煤矿瓦斯防治相关技术,提出了工程勘探和超前探排气,沉降监控及注浆,隧道通风,喷出沼气引排等4种沼气危害的防治办法。
In the development of underground space, shallow biogas as an engineering geological disaster, affecting the safety and quality of tunnel construction. First introduced the causes of biogas, occurrence characteristics. Then it expounds the harm form and its intrinsic mechanism of shallow biogas in tunnel construction. Finally, according to the engineering characteristics of shallow biogas formation, the paper introduces the related technologies of coal mine gas prevention and control and puts forward the prevention and cure measures of four kinds of biogas hazards, such as engineering exploration and advanced exploration and exhausting, settlement monitoring and grouting, tunnel ventilation and discharge of biogas.