金家坝水电枢纽工程引水隧洞易爆(瓦斯)气体形成机制及易爆(瓦斯)气体超限预测  

The Explosive Gases Formation Mechanism and Overrun Forecast of Jinjiaba Key Hydropower Project Diversion Tunnel

作　　者：邢国军[1] 李占军[1] 郑奕芳[1] 

机构地区：[1]中水东北勘测设计研究有限责任公司,吉林长春130021

出　　处：《资源环境与工程》2009年第5期679-682,共4页Resources Environment & Engineering

摘　　要：简单介绍了金家坝水电枢纽工程的地质岩性及地质构造,分析瓦斯气体的燃烧爆炸特征。针对施工过程中2#施工支洞出现了易爆(瓦斯)气体而影响施工的现象,采用经典地质理论论证了易爆(瓦斯)气体的形成机制及赋存空间,结合本工程的地质条件,预测隧洞施工过程中可能出现易爆(瓦斯)气体的部位,提出建议以达到指导工程施工的目的。This paper briefly describes the geologic lithology and geological structure of Jinjiaba key hydropower project and introduced the characteristics of combustion and explosion of gas. According to the explosive gases appeared at working tunnel 2# which have an affect on the construction process, we discuss the formation mechanism and occurrence of space of explosive gases with the classical geological theory, and, combining with the geological conditions of the project, forecast possible location where explosive gas appear, thus, to give advice for engineering construction.

关 键 词：易爆(瓦斯)气体 生烃能力 空隙(虚脱)现象 气体积聚 排放通道 

分 类 号：TV672.1[水利工程—水利水电工程] TD712[矿业工程—矿井通风与安全]